I dont beleive in multyple dx's, One lady on another site I go to (for parents, this site i go to to talk to peers) had a son dx'ed with ADHA, AS, Bi-polar, OCD and 1 other thing, thats crazy, and i think many of these dx's have symptoms that overlap, and we as a society really need to be careful and not allow this to happen its insane.
My parents and the school got me Dx'ed when I was little because I was not social and acted strangely (slow talk, rocking, aloof) my mother at first thought it was a normal little boy thing (she never grew up with a brother) but my father (who is definatly AS) grew up with many brothers and systers and noticed I was not normal. I got Dx'ed first when I was 4-5 and then again when I moved (same DX) at the age of 8. Had I been DX'ed a decade later I woulda had the AS label instead of the HFA label.
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DX'ed with HFA as a child. However this was in 1987 and I am certain had I been DX'ed a few years later I would have been DX'ed with AS instead.