I received my ADHD diagnosis at 19. My autism diagnosis did not come until I was 26.
For seven years, I already knew that my mind worked differently, yet a large part of the explanation was still missing.
Why did unexpected changes affect me so strongly? Why could a conversation look entirely ordinary from the outside and still leave me exhausted for the rest of the day? Why did I need clear routines while my ADHD constantly searched for something new? Why did a sound refuse to remain in the background and instead compete for attention right beside my ear?
I treated many of these things as bad habits, oversensitivity or a difficult personality.
At 26, my personality did not suddenly change. I finally gained language for experiences that had been present for a very long time.
The short version
- Autism may not be recognised until adulthood, but its features do not begin in adulthood.
- Common areas include social communication and interaction, routines and change, focused interests and sensory differences.
- Masking can hide the effort behind behaviour that appears unremarkable to other people.
- Individual traits are not an autism test. The overall pattern, childhood development and everyday impact matter.
- Many of my apparent contradictions only made sense when I considered ADHD and autism together.
Autism in adults did not look the way I expected
My old picture of autism was far too narrow.
I thought it had to be immediately visible. I imagined someone who never made eye contact, could not do small talk and always displayed the same obvious behaviours.
I did not recognise myself in that image. I could be friendly. I could present, work, laugh and hold conversations. I could adapt.
What I did not see was that many of those behaviours were not automatic for me. I calculated them.
I watched when other people smiled. I made eye contact deliberately. During a conversation, I considered whether I was showing enough interest, talking too much or choosing an appropriate answer. It often looked natural from the outside. Inside, many processes were running at once.
That is why the following points are not a checklist for diagnosing yourself. They are personal experiences that overlap with recognised areas of autism. Other autistic people may experience them very differently.
1. Social situations felt like tasks
I wanted to understand people. I wanted to belong. Lack of interest was not the problem.
The problem was that a conversation was rarely only a conversation.
While other people seemed simply to speak, I was coordinating tone, facial expression, the right response, conversational pauses and eye contact. I searched for rules that nobody had stated.
After the encounter ended, it often continued in my mind. Did I say too much? Was my answer rude? Should I have laughed at a different moment?
I eventually understood that visible social ability and internal effort can be very far apart.
2. Eye contact was possible, but it was not free
I can look at people. For a long time, that made me think autism could not apply to me.
But “Can you make eye contact?” was the wrong question.
A better question would have been: What does eye contact cost you?
When I have to look into someone’s eyes, process their words and formulate a response at the same time, my mind fills quickly. Sometimes I listen better when I am not looking directly at the person. Even so, I learned to create eye contact deliberately because I understood that people expected it.
The result looked socially appropriate. The cost remained invisible.
3. Small talk required an internal script
“How are you?” sounds like a simple question.
My mind opens several possibilities: Does the person want an honest answer? Is “fine” merely the expected signal? How long may my answer be? Am I supposed to ask the same question in return?
Over time, I learned standard responses. I learned when to ask about someone’s weekend and how to end a conversation without appearing abrupt.
These scripts help me. They also mean that apparent social ease may be built on considerable preparation.
When a situation moves beyond the script, I need longer. Not because I have nothing to say, but because I first need to work out what kind of answer is being requested.
4. Ambiguous language made me uncertain
I cope better when people say what they mean.
Hints, mixed messages or an expectation carried only by tone consume a lot of energy. I can understand irony. I even use it myself. Yet uncertainty can remain: Was that serious? Was it a joke? Is there a rule here that I have missed?
It becomes particularly difficult when someone gives me a task but does not explain why. My mind then tries to fill every gap. A small request can become a large and unclear problem.
Clear language is not unnecessary simplification for me. It removes work that would otherwise take place invisibly in my mind.
5. Routines were not a quirk; they were stability
I need sequences I can rely on.
When my morning begins in a familiar order, I do not have to decide every action again. When objects have a permanent place, my mind does not have to search for them. When I roughly know how the day will unfold, I have more energy for what is genuinely new.
From the outside, this may look rigid. To me, it is a handrail.
If one part suddenly disappears—there is no coffee, an unexpected appointment appears or a call interrupts the sequence—the disruption does not stop with that moment. My mind has to recalculate the entire path that follows.
I did not build a morning routine with ADHD to become unusually disciplined. I built it so the day would require fewer decisions.
6. Changes were larger than the event itself
A moved appointment is objectively only a different time.
Internally, it can mean that the version of the day I prepared no longer exists.
I may already have planned when to eat, how long to work, when to leave and when I can be alone afterwards. If one piece moves, many others need to move with it.
My response therefore sometimes appeared disproportionate. Today, I can see that I was not reacting only to a ten-minute change. I was reacting to the loss of an entire internal plan.
7. Switching cost more energy than the task
Sometimes I can work on one thing for hours. The difficulty begins when I need to stop and do something else.
I am not simply changing windows. I have to close a thought-world, preserve its open connections and load a new context.
An appointment at 3 pm may occupy space from the morning onwards. My mind knows a transition is coming and remains prepared for it. The time before it does not feel entirely available.
I describe this in greater detail in task switching with autism. It mattered for me to understand that difficulty with transitions is not the same as a lack of motivation.
8. Sensory input did not stay in the background
The hum. The light. A notification on the screen. A conversation in the next room. The fabric against my body.
Other people seem able to filter many of these things out. For me, sensory input more often remains in the foreground. It is not equally strong every day. But when my system is already full, one sound may become the final drop.
I used to try to tolerate more through force. Now I reduce input earlier: earplugs, a quieter workspace, fewer parallel tabs, a silent phone and time without conversation.
That is not surrendering to the world. It is adjusting the environment. I write more about it in sensory overload with AuDHD.
9. My interests were more than hobbies
When a subject captures me, I do not want to understand it superficially.
I want to see the system underneath. I research, build, test and improve. One idea can become an entire world. Software and systems provide something social situations rarely do: traceable rules, direct feedback and permission to explore details until they genuinely make sense.
That intensity is a strength. It helped me learn and build meinsystem.
It also needs boundaries. Otherwise, I lose time, meals, messages and the transition out of work. In my daily life, autistic focused interests and ADHD hyperfocus are not always easy to separate.
10. Functioning was followed by collapse
I could appear friendly, available and productive for an entire day.
At home, everything dropped.
I no longer wanted to speak. Light and sounds became too much. Decisions that had been possible that morning suddenly were not. Sometimes I simply needed to lie in a dark room.
For years, I saw only this second part and thought I was unpredictable. Now I also see the hours before it: the monitoring, adapting and enduring.
I describe this masking in more detail in when you play a role all day. It helped me function visibly. It also hid from other people how much support I actually needed.
11. My ADHD concealed part of the autism
Perhaps the greatest reason I misunderstood myself for so long was the contradiction within me.
My ADHD searches for novelty, ideas and movement. My autistic side searches for predictability, depth and a clear sequence.
I can begin a new project spontaneously and still be overwhelmed by a small change of plan. I can appear chaotic and urgently need fixed routines. I can talk a great deal and still find social situations exhausting. I can want variety and hate transitions.
Whenever I looked at only one side, the other did not fit.
Only AuDHD—ADHD and autism together—made these contradictions understandable. I explore these tensions further in ADHD or autism?.
Why these 11 experiences are not a diagnosis
Many non-autistic people recognise individual points here.
Almost everyone is socially tired at times. Many people like routines, have intense interests or dislike noise. An autism assessment therefore does not depend on recognising yourself in a single paragraph.
It considers a persistent pattern across several areas, features that reach back into early development, and the effect on daily life, relationships, education or work. An assessment also considers alternative explanations and coexisting conditions such as ADHD, anxiety, depression or OCD.
An online questionnaire can provide initial orientation at most. It cannot collect a developmental history, evaluate other causes or see how much effort goes into compensation and masking.
What you can observe before seeking an assessment
If much of this feels familiar, you do not need to produce a perfect life story immediately.
You can start small and collect concrete situations:
- What happens visibly? For example, withdrawal after conversations, distress when plans change or strong responses to sound.
- What happens invisibly? Which rules are you calculating? What do you suppress? How long do you need to recover?
- How long has this been present? Old school reports, family accounts or memories of friendships and interests may help.
- Where does it cost you daily functioning? Work, relationships, self-care, appointments or recovery.
- What already helps? Routines, direct language, headphones, written agreements or fewer transitions.
You can bring these observations to a primary care, psychiatric or psychological professional. A full assessment should involve qualified professionals with experience in adult autism.
What changed after my diagnosis
The diagnosis did not remove my difficulties.
It changed the question.
Previously, I asked: Why can I not function normally?
Now I ask: Which conditions does my mind need for this day to work?
That leads to different solutions. Less sensory input instead of greater force. A clear next step instead of ten open possibilities. Making transitions visible instead of expecting them to happen automatically. Planning recovery instead of reacting only when nothing works.
That need is why I built meinsystem. It is not a treatment for autism or ADHD. It is an external framework for my daily life.
Do not make your mind the only place where your day is stored.
If routines, appointments and unfinished tasks quickly overload you, give the next step a visible home. Start using meinsystem.app for free →
I do not need a system that rewards me for a perfect day. I need one that still tells me what comes next on a difficult day.
You have not suddenly become a different person
A late diagnosis does not rewrite your past.
It can change how you read it.
Perhaps you were not too sensitive. Perhaps you were processing more sensory input. Perhaps you were not antisocial. Perhaps social connection simply involved a great deal of invisible work. Perhaps your routine was not ridiculous but supportive.
For me, receiving the diagnosis at 26 was not the end of the search. It was the moment many separate memories finally became one coherent picture.
Frequently asked questions about autism in adults
What are common signs of autism in adults?
Possible signs involve persistent differences in social communication and interaction, a strong need for predictability, intense or narrowly focused interests, repetitive behaviour, and heightened or reduced sensitivity to sensory input. Every person’s presentation is different. Diagnosis considers the overall pattern, childhood development and meaningful impairment or substantial compensatory effort.
Can autism begin in adulthood?
No. Autism is neurodevelopmental and begins during early development. Some features only become obvious when demands increase, while others remain hidden through adaptation and masking. Diagnosis may therefore take place in adulthood.
Can autistic adults make eye contact?
Yes. Some autistic people avoid eye contact, while others learn it deliberately or experience it differently depending on the situation. What matters is not only whether eye contact occurs but how natural it feels and how much attention or energy it requires.
Where can an adult seek an autism assessment?
A primary care doctor, psychiatrist or psychologist may be a first point of contact, depending on the local healthcare system. A full assessment should be carried out by qualified professionals or specialist services with experience in adult autism. Access routes and waiting times vary by region.
Sources and further context
- NHS: Signs of autism in adults provides an accessible overview of communication, routines, interests, sensory differences and masking.
- NICE: Autism spectrum disorder in adults covers social communication, resistance to change, interests, sensory differences, developmental history and comprehensive professional assessment.
- Informed Health: How is autism diagnosed? describes late recognition, assessment and alternative explanations. The source is German-language independent health information.
- Zhuang et al. (2023): Systematic review of autistic camouflaging synthesises research on masking, psychosocial factors and wellbeing.
This article describes my personal experience and general information. It is not a self-test and does not replace medical or psychological assessment or treatment.