still wondering

just read the newspaper a few days ago and i saw an article on autism. there was this illustration of signs of autism which caught my attention. so i read it, and i thought, "holy shit! im autistic". i exhibit most of the signs! im indifferent to my surroundings, im content to be alone, avoids touching, inappropriate attachment to objects, doesnt maintain eye contact, undersensitive to pain or danger, etc. unfortunately, i didnt read the articles, since i didnt have time (yeah right, what an excuse). anyway, i didnt have these "signs" when i was a kid. i was more of an ADHD kid. well, i only appear to be. going back, i only developed the signs when i was in highschool, so it was more of a personality change. so, im not autistic. and i was a bit disappointed. not that i want to be autistic (and not that there's something inherently wrong with being one). its just that, ive been looking for an explanation on how i came to be this guy i am now. comparing my life as kid, or my personality when i was a kid, to my personality right now, it would appear that the two personalities are contradictory. not that i dont like the person i am now, i just want answers, or an explanation on how all these happened.