abnormal uterine bleeding
"My doctor put me on this birth control 6 weeks after I had my son. I told him my periods are really heavy an the cramping (no lie) felt like I was having really bad contractions. My appointment was on a Monday so he told me to take Sunday and Monday together, and I was already on my period for 3 days so my check up was a little awkward. He told me it would help with my cramps and lighten/shorten my period. Well, the next day my period was just about gone and I had no cramping whatsoever."