abnormal uterine bleeding
"I just started this birth control to help my heavy flow and period cramps and when I began my pack, I was happy with the results because I had less acne and I never felt achy or crampy. As soon as I started the sugar pills, I got my period and my cramps continued to be as bad as they were before. Although my flow wasn't as heavy, my cramps were bad enough that I had to miss school and my extracurricular activities."