endometriosis
"I've been on progestin-only birth control for about 3 years. I started on Ortho-Micronor, I had a period for about 3 months straight but then my period stopped entirely. Then I moved and I was given Camila (same thing, different brand), it kept in line with the "no-period" havingness. It was great. Moved again, I was given Errin. For about 2-3 months I was ok, but I noticed some changes in my mood and some bloating. Then about 3 months in (February 2014) I had spotting. I thought maybe it would be normal after having NO period for 2 years, but then 2 weeks later I had a full-on period. Since then I've had maybe 3-4 periods in 2 months, extremely painful tenderness in my breasts. "