I had my mirena place in October 2008. I had no symptoms at first, but about 3 months ago that all changed. I'm losing my hair, severe abdominal cramping, fluttering (like being pregnant), severe lower back pain, dizziness, headache constantly at least once a day. I also had regular periods up until last month, when it simply never came. I freaked thinking I was pregnant I had all symptoms (tender breast, missed period, frequent urination, and nausea). So I called my doctor and demanded he order a blood test because with my son the home pregnancy test did not show positive until I was 3 months pregnant. Of course the test came back negative, but I swear I am pregnant, all the symptoms I had with my son I am having now. I know that I'm not but these are crazy side effects from the mirena..Also I didn't know until I read on here that the cyst are a side effect I have one on my right hand that just appeared out of no where about 3 months ago as well..It hurts just to type :)....In the end I will not have the mirena removed, the benefits surely out weigh the risks. Good luck to everyone with the mirena!