endometriosis
"I started Seasonique in September of last year. The first 3 month pack worked awesome for me, my acne cleared up, my cramps from Endometriosis diminished, and I only had 1 period in 3 months with no break through bleeding or spotting. However, in week 5 of my second pack I started spotting, a week after that I was bleeding like a regular menstrual cycle.  Also my cramps became more severe and I developed tremendous pain in my lower back.  I have been bleeding for the past 6 weeks since I first noticed the spotting and my cramps have come back in full force.  After reading some of the reviews on this website I feel a little better but I suppose my case is a rare and extreme reaction because I haven't seen anything too close in comparison."