ldrlori

My son is 19 yrs old. I have had him in and out of doctors offices throughout his life. The only diagnosis I have been told is Developementally Delayed.
He cannot drive because he gets lost too easily or his attention drifts too far from what he is doing. He will sit and play video games for hours and hours. If he gets a new game, he will repeat the same procedures over and over for hours and then suddenly do one thing different. He has had a couple of jobs over the last few years but, always the same thing, he's too slow or someone has to be there with him telling him what to do in what order repetitively. My son is a math whiz but has no reading comprehension. He has some odd behaviors but, not defiant just odd.. like shaving his eyebrows or shaving arm hair and gluing it to his chin. He is socially introverted and has bad anxiety if we are in a restaurant and he sits where he can see others easily so we sit where he faces a wall. If you give him more than one task at a time he gets very nervous. He has no common sense, I have had to repetitively teach him dangers and my husband and I fear that if he lived on his own he would easily leave the stove on, forget he is cooking or be led astray by some criminal because he does not understand limits. Although i have tried desperately to teach these. When he was a baby, he didn't speak until almost 4, he's had speech therapy and been in Special Ed all his life. Being bullied in high school caused him to drop out. I think he's elligible for disability but, my husband says we have to have him assessed by someone for social security to even consider him as a candidate. I don't know who to go to or who can evaluate him. Do i just take him to an MD? If someone knows what steps I should take please help!!