Is anyone else on a 4-6 week mood cycle since they started Prozac? (depressed-angry-amazing)

I feel like I basically am just cycling through 2 weeks depressed- 2 weeks angry and agitated where it feels like there's a motor starting in my head and then 2 weeks amazing where I feel calm, happy, and my OCD is basically gone. Anyone else have this? It's very frustrating and I've been doing it like 3-4 months now.