Hey, I don't know that I have ADD/ADHD per se...but when I went to public school (before we switched to homeschool) they wanted to test me for it because I couldn't concentrate. I actually have gotten much better at that these days, but your description of yourself as 'hyper', 'talkative' 'loud'...that totally fits me sometimes. If you just met me you might not know it cause I'm pretty shy and quiet around people I don't know very well, but my family can attest...I get into 'hyper mode' sometimes. O.O During which I act like a 12-year-old (no more sugar for me, lol). And I'm 19. So just know, whether or not I have ADD/ADHD, I have very much the same personality. It's actually refreshing to know someone my age has the same personality.
Oh and I get really REALLY into fandoms to, which can drive people up the wall. XD
PM me sometime?