well look, ive been smoking since i was 12, which is probably one of the reasons i have ocd, if it hasnt made anything worse, chances are it will soon, however you could be one of the lucky 70% and your ocd could come from somewhere else.

as far as anti depressants go, they are not good, i tried them i didnt like them, i never plan to go near them again, however therapy is good, im not sure if theres a diff between yank law and aussie law, but over here a shrink cannot force you to take your pills, in fact no one can, if you go to therapy and they recommend anti depressants, and you do not want them, simply tell them no, tell them you want to be treated with therapy and not drugs, you could also try them out, see if they help, if you dont like them its very easy to stop (depending on what they give you though)

what my therapist did was sit with me and we took a look at my compulsions and found why i was repeatedly washing my hands, or checking the doors were locked, knowing why you do the things you do helps ya stop doing them, and that is why i recommend therapy