Ethinyl estradiol / norgestrel
"Before being on birth control, I had light bleeding, but terrible, painful cramps, and I started experiencing migraine headaches from my periods. The first bc that my doctor put me on I immediately started having worst abdominal cramping that I ever felt. So, after six months, she switched me to low-ogestrel 28, the first month was fine, but now I'm experiencing abdominal cramping again, and a little light headedness during the intense cramping, I take the pill in the morning, and the cramping happens, usually at night. I also think that its messing up my GI tract, because I'm experiencing upset stomach & diarrhea issues that I have never experienced before, I definitely will be switching to something else."