Some generalists are afraid to do anything close to something handled by another specialty, but I also think many might not realize how much of a guessing game psychiatry really is rather than knowledge-based.
I think an antidepressant is worth a try, no matter what your diagnosis is. Unless someone is bipolar or psychotic, most people start on Zoloft or Celexa (might be Lexapro now). Why not try it, with how bad off you are at this point, what would you have to lose?