Don't be so hard on yourself, try to see the positive aspects of it, you now have the opportunity to work on yourself. It also took me over 30 years to realize that I had ADHD. You only realize a lot of things now, we've been looking for this one piece of the puzzle the whole time, it won't do you any good except put you in a bad mood if you put yourself down because of it. I wish you a lot of strength, you are a great person.

Have you also only started analyzing the way you think once you asked yourself if you have ADHD? Like why didn't I notice just the sheer amount of thoughts. Or how could I not notice these hour long hyperfocus sessions before and that this was not how everyone works?? I was diagnosed at 25. Once you start questioning if your brain is "normal", you start noticing all sorts of things. But before that, I didn't even think about how I think. Or whether it's different to others.

NUMO ADHDNUMO
ADHD

I wish I had been more reflecting sooner.