Yes, I had severe behavior problems as a child, especially severe meltdowns, almost everyday!!! I was diagnosed ADHD back then, but of course it was really popular in the 90's....
Anyway therapists and psychiatrists told me my childhood behavior was in fact autism and now I also have Bipolar and GAD....
But my last talk with the doc was bizarre... His first question was asking me about my ADHD! I said I haven't been diagnosed with it in a long time... Then he told me to read about it and take online quizzes.... But it doesn't sound like I need meds... I mean if I have ADHD I don't think it's severe for sure... But this talk with the doc was bizarre and came out of left field... Quizzes I have took come back "moderate ADHD"