i had "problem" on the shot.
if it's Depo, i can tell you about my ultra ****ty experience:
okay, you of course get it every 4 month. and it does for the most part stop your period. HOWEVER, it doesn't stop it completely. and it may not stop it at all and your system can get all kindsa ****ered up. in my case, i bled heavily for the first 4 months after getting the shot. i got the second shot and it stopped, but when i started nearing the time for me to go get the shot again (weeks 9-12), i had the most horrifying 3 week period. i got the shot 2 more times before i just got sick of it. but that **** working out of my system was horrible! really graphic girl details i'll spare you, but to sum it up, i landed myself in the ER because the cramping was so bad i couldn't walk.
and among other things, significant weight gain and dizziness.