abnormal uterine bleeding
"I am a user of the birth control shot and I honestly love the fact that I do not have to worry about taking the pill. I just go to the doc every three months to renew my shot. But the only thing I hate is the bleeding for long periods. I have been on theshot for almost a year and a half. I remember the first three months, I experienced excruciating pain one day in my stomach, it felt so bad. I was in class and I had to run to the bathroom. When I was sitting on the toilet, this HUGE blood clot came out. It was almost the size of a tennis ball. Afterwards, my cramping stopped."