I am not formally diagnosed (nor self-diagnosed) but I have had my suspicions for a while. The biggest example that I can relate to the most (and that I see talked about a lot in regards to autism) is not knowing what to say in conversation; basically feeling as if everyone but me received a script. I never know what to say and I take forever trying to come up with replies to people via private messages/email.. Live text chat/phone calls/in-person conversation is so much more difficult for me so I try to avoid it as much as possible. Eye contact is weird too, I can maintain eye contact but I find my mind wandering during it, wondering if I'm making too much eye contact, wondering if it's right to look away and when/where I should look to, etc. and so I end up not remembering a lot of what the person that I was talking to said (unless it's someone I'm really comfortable with, like my mom or my husband). I feel like I can read people pretty well.. I just dunno what to say to them.
Idk if I have sensory issues? I hate being in crowds or even just moderately busy places. I hate the sensation of wearing make-up/hairspray, so I don't. I hate using graphite pencils. I hate any drink that isn't water. But for all I know those could simply be normal dislikes rather than sensory issues.
I can also be pretty sensitive and really dwell on something negative someone did/said to me, or something negative that
I did/said, and I'll never really truly move on from it. Even if it's something small I'll still be thinking about it 10+ years later.
I can also relate to the concept of hyperfixating; for example five years ago I came across a betta fish subreddit and before I knew it, I was researching everything I could about betta fish and fish keeping for hours and hours, everyday, for a few months. Thought I was an expert at this point so I got my own 10 gallon tank, properly cycled it and everything, and my fish still died within a few months despite all the research and care that I did
Anyway.