abnormal uterine bleeding
"The first three months went alright- I was quite moody and emotional, but nothing more than how I am when I get PMS. It was bearable and didn't last too long. I had one period for two weeks. After taking the second shot, I have had a period for over a month and a half now (an actual heavy period, not spotting). My acne has gotten worse. I'm definitely switching to the pill when I am ready to get my next shot. "