At the moment I am not on any pills but I self medicate.

I find that, rather than make me anxious or anything, caffeine helps me concentrate and, relax in a way. It generally doesn't interfere much with sleep, I don't think, because I sleep poorly most of the time no matter how much caffeine I consume.

Whenever I have tried sleep aids I have found they keep me awake worse than any caffeine binge.

Do you ever experience anything like that and do you think it makes a diagnosis of ADHD more or less likely?

I don't know much about ADHD or its treatments but do stimulants help you, and do they affect you the same as people without ADHD?