endometriosis
"I was on this for 7 weeks before stopping to try to conceive. It was wonderful in that it finally took away the pelvic pain I continued to have on other pills. I had a light period within three days of stopping it. I've had two full cycles since, and they've both been shorter than usual, with a short (8-10 days) luteal phase. I'm hoping this sorts itself out soon. Unfortunately I don't see myself taking this again, because it made my migraines much more frequent, and gave me fairly bad heart palpitations. A less troubling complaint was increased acne."