Until now, the only noticeable difference is that I haven't had a period, only very occasional spotting. In recent months I have experienced all menstrual symptoms, moodiness, breast tenderness, cramps, regular heavy spotting (not quite a full period, but regular enough to feel like one) and extreme skin reactions, pimply rash all over my face and upper back - I have never had skin problems even on the pill before kids. Could my mirena be losing its effectiveness? Why symptoms now after 3 years hassle free? Any advice?