I absolutely loved my Mirena for the first 2.5 years... up until my body rejected it and I began to pass the IUD through my cervix. I believe this happened because of rough sex, which Mirena and doctors say can't happen. Well, it happened, and it caused the worst cramping I've experienced, truly debilitating me until I got it removed. I then tried a new IUD and the cramps, although not as bad, returned, accompanied by terrible mood swings and emotional vulnerability. I was told my body wasn't right for an IUD, which is odd because it worked for 2.5 years! I think everyone should still try the IUD, as it was the best birth control I still have ever used... before I couldn't use it anymore.