I was on depo provera for a year, during which I gained 50lbs. This may also have had to do with it being my first year living out of my parents home and adjusting to cooking decent food. Anyway I went off of it in June and joined a gym and after working out 3-4 times per week, I lost 4 lbs all summer(4 months). Anyway by the midfall, my body's reaction's regarding weight loss/gain were back to normal. It probably won't take that long for you because you weren't on it as long.