I have had mirena for 18 months now. I haven't had any problems with it until the last few weeks. A couple of weeks ago I started getting nausea, moody, and tired a lot. I didn't think much about it a first, just figured it was from stress. When I went to check for my iud strings I couldn't find them, tried a few times and never could find them. I went to a new doc, cause we had moved. The Dr. Said the end of the strings were up inside my cervix. She said it had just "settled" in. I told her I thought I might be pregnant, she said no the iud is still in place. My ob, the one that inserted, told that the length of the string shouldn't change. I haven't had a period in almost a year now. So I don't know when I would be late. Starting last night I have been sooo crampy, never really get this crampy. I do have a appt. With my Dr., but couldn't get in until jan. 19. I would really appreciate in advice and information you could give me. Thanks for taking the time to read my questions.