Wow, difficult to know what to say. I'm on prozac too and it has helped tremendously with my OCD, just wonderully. And I guess in the beginning it made me almost feel high, but I think that's because it was so wonderful to be free of all the OCD stuff after such a long time of suffering... hard to say sometimes if a depression is a reaction to something going on in your life or if it is endogenous (caused by brain chemistry). Yes, stress can certainly trigger depression! And maybe the depression fighting part of the prozac gets weaker with time (I have heard of peple having SSRIs "poop out" on them). Even when the OCD fighting part is still working. I don't know.
Ummmm.... (would you believe it I am writing to you from a computer in a cafe while a poetry reading is going on, see i can do all these things again...)

What was i going to say... it is also possible that the first "high" f the prozac wears off and normal things affect you more normally again?
Just some thoghts... from a fellow prozac user...
Kathrin