Conversation.
Had gone to local mental clinic & had "intake" with counselors who asked various questions & wrote that all up with possible ideas for my dx (a bunch of disparate things, such as eating disorder NOS, anxiety, and so on). I probably also filled out one or two of those depression or anxiety symptom inventories, can't recall.
Anyway, after all that I finally got in to see the shrink (long waiting list for appts.) & after our conversation, his hypothesis was this thing I'd never heard of (Asperger's or HFA)-I thought he was insane to even consider such a thing in relation to me. Parental insight into (confirmation of) my childhood behavior/tendencies was unavailable since my mother was dead & my father was mostly "out of the picture".
That was back in 2004 & I've come to agree that this label actually does apply to me, but it took a ton of researching on my part to make any sense of this. Was having overall life crisis (divorce & poverty), so was in worse shape (level of functioning) than I am now-since receiving this dx my situation has improved, both in terms of understanding the complex list of unusual aspects about me as well as my external life conditions (have nice new boyfriend).
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*"I don't know what it is, but I know what it isn't."*