Make a list, especially if you can think of any “why do you do that” things that other people (or you) have said to you. Talk to the doc about the things you hate and love about yourself and others. Be honest, and realize that things that seem normal to you could all be symptoms you’ve just gotten used to. The older you are, the more likely it is.
Sometimes I stop eating something not because I’m satiated, but because I’m tired of chewing. I randomly mentioned that once and my doc said “That might be one of the most ADHD things I’ve heard.” Of course there’s a laundry list of other things.
Realizing now that you should’ve started then? Sounds like another thing to write down. Especially if you’ve been telling yourself you need to do it every couple of hours.