Depro-Porvera Weight Gain!!!!!!

Oh dear oh dear...this shot was a godsent for well only a few months...i was always a fit person i eat so healthy i exercise and take care of my weight and it has always been easy for me to keep off extra with exercise....all of a sudden....like a lightening bold comes all this weight...and because of what...this stupid shot. My grad is coming up so if i dont get off it now and flush this out of my body i wont be too happy! I suggest not going on this shot! if anyone knows any ways to get this out of my body fast please let me know!! thanks