abnormal uterine bleeding
"I'm 17 and I went on depo for very heavy bleeding. Like so heavy I would go through a super plus tampon and over night pad in less then a hour. I had the first shot about a month ago and it was fine a little pain but all shots do and now a month later a got my period much lighter for 11 days which is very long for me then there was a 1 day break and now it started again so in total I have been on my period for 15 days I can't even go to school because the bleeding is very unpredictable its heavy one minute and lighter the next there is also large palm size. Clots never had those before and the cramps sent me to the ER thinking I was having an appendix attack.  I never had cramps this bad before.  Don't know whats going on but I am not happy"