Wow, you deserve a lot of admiration, in my opinion, for coping with so much.
What you really should do, I think, is find a psychiatrist/psychologist whom you respect and deserves that respect, and be COMPLETELY, brutally honest, telling him/her everything straight away: what you wrote here and your complete history, so then you can go onto your daily concerns. Not only should the doctor be able to diagnose you with some sort of precision, but you could continue a definitely useful therapy path with him/her.
I understand that you want an answer, I really do, because I so dearly want one myself, and my psych has decided it's best for me not to be aware of a diagnosis at all. But diagnosis are not for the use of the patient, they are purely for the doctor, just so he can have a schematic view of you, to treat you appropriately. But a competent psychologist will not "cure" you according to your diagnosis, he'll be looking at YOU. The fact you got so many different ones is not indicative of the fact that your Ts so far have been wrong, just that they chose particular schemes in order to treat you. You have a lot of symptoms, and mental illnesses are often overlapping, mixed, cohabiting, thus, you're very exposed to receiving very different opinions.
Try not to let it matter so much and concentrate instead on getting better! (That's what I've been telling myself!)

Also, just to confuse you further: have you ever considered Bipolar? It's just my very unprofessional impression, based on very scarce information, but anyways you might wanna look into that, since you asked for views!
There's a really brilliant documentary by Stephen Fry on Bipolar: The Secret Life of a Manic Depressive. You can find it on topdocumentaryfilms.com , and even if the diagnosis doesn't fit you, there are a few experiences in there you might relate to and could help yu understand yourself better.