I had the mirena implanted November 2014. I had really bad pain and bleeding for about 3 days after implanting. No bleeding, periods, or pain after that. About 3 months ago I started getting bad cramps that went into my back. It felt more than period cramps but less than contractions. This has happened every day for 3 months now. Recently I have gained weight, I feel nauseous, dizzy, irritable, tired, painful sex, and today I had light pink discharge. About a month ago during intercourse my husband and I felt kind of a popping. I seen my ob/gyn 2 weeks ago and he did an exam and a vaginal ultrasound and said my mirena is still in place. What could be causing all of this? I'm more concerned now that I'm having pink discharge.