Psychosis definitely kicked in before anything else, which is why we're thinking maybe schizoaffective. By 15 I was dx'd psychosis NOS and was hiding under my bed from KFin and 9twoO, my two abusive gollum like creatures that followed me around everywhere, threatened me, poisoned my food, and told me to do certain things that would range anywhere from moving a pen two inches to the right to killing my whole family and myself.
When I was 13 I heard the voices of Gods narrating my actions, but I thought it was a normal thing everyone had. When I was 5 I saw aliens in the backyard. I still don't know if it actually happened, if it was a dream, or if it was a hallucination.
The depression started happening when I was probably 16 or 17. The mania when I was 18 I think. I think I had had hypomanias before when I was 16/17 though.