People keep telling me im so slow?

I am male and 17 and I am wondering if I have some sort of mental disability. I am in special education and on an IEP and I have ASD but the teachers say I have aspurgers. I don't know why but I think I may be more retarded. For some reason I have a hard time paying attention to what people are saying. I would dose off when someone is talking to me and then I would not know what they where talking about. I am in a lower math cl and I am in there with freshman and I am failing it. There is this annoying kid who keeps telling me that I am doing the work wrong and that I suck at it. I hate that cl because of him I feel so stupid to be in there I wonder if I'm retarded or not. I also remember a time whn I was in cooking cl and I was cutting something and one of the kids say "don't cut your self" and I wondered why and I heard this other girl say "oh you just look like you do no offence but you seem kind of slow" or she said something like that. I also get taken advantage of pretty easily like ne year when I was with my cousins I was nice enough to let them play on my laptop but then he changed my pword and changed the background and luckily it was fixed. But then the next time I heard my cousins in a conversation calling me retarded when I was half alseep at night because there where not that many beds. I also am shy ad quiet and have self esteem issues and I was told that when I was a baby I was cognitively delayed at 18 months by about 10 months. I think my IQ is lower than 70 I also had heart surgery When I was a baby and I also have degorgie syndrome or VCFS. I am sorry if this is long. I am not a spam not or anything like that. Also don't tell me that I write good I think this was written horribly because I was half asleep When I wrote this I know that some people with lower IQs can write good. I was just lucky enough to use the spell checker. I also don't want any troll or rude answers to my question