If you had to diagnose me, what would you say?

I'm going to try and erase from my mind all the possible things I could have, and all my biases, so I can get a much more accurate picture of what I am. First of all, I have posted this sort of question a million times, looking for reaffirmation or some consolation. I feel a sense of numbness almost all the time and obsessively check things. I unnecessarily reread and rewrite things. I also can't play certain video games because I have to do things in them in a certain way. I write down all my calories consumed each day, and once in a while will binge beyond my caloric maximum because I am afraid I will. It's difficult for me to go to school because I am awkward around many people. I have very minor mood swings, but mostly it's related to my anxiety. When I was younger I thought that I was the Antichrist and threatened to kill a girl who was mean to me. I attempted to commit suicide twice by overdose. I obsess about racial purity. For example, I'm Sicilian and worry that I might have some ******* blood. Sorry if that offends anyone, I'm just trying to give you a full picture. I also am very irritable a lot of the time and extremely cynical. I can't focus in school that well either. I've been on several antidepressants with little effect. I've received different diagnoses from different psychologists, so now I obsess over what mental illness it is that I really have. And don't tell me it's normal teen angst, because it's almost certainly not. It's beyond that.