I agree with vetivert and Duncvis.
As vetivert has said, sometimes it is not possible for someone to get a diagnosis. I do not know for certain if I have AS, but I went to see a counselor recently, and she told me she didn't think I had it since I was able to interact with her fairly well. Had she seen me in Jr. High school, I imagine her opinion would have been rather different. I have come a ways since then, mainly due to the criticisms and guidance of the people around me.
I don't think that anyone would self-diagnose themselves with AS without a good reason to do so. And I think that one would have to have a certain amount of difficulty in the related areas in order for one to even consider the fact that they may have it.
I am sorry to hear you went through that, Tali, but just as there is no way for us to completely understand what you've been through, you also do not know what we've been through, either. Many of us who self-diagnose have wondered for a long time what might be "wrong" with us. Without any explanation, it can make things extremely difficult, both when dealing with others and when reflecting on oneself. While you may have felt "officially" inferior, I have always felt inferior on my own. I did not need a doctor to tell me that I am not like many other people, and that there are things that I either can not do or have a lot of difficulty with. I sometimes wish that I had, though, so that I could atleast explain to my parents why I am so different, why I am not growing up to be the daughter that they probably expected.