I had Mirena put in 2 days ago for post menopausal progesterone to balance the estrogen. My gynecologist said that absorption of progesterone into the systemic circulation was minimal, but when I read the pamphlet that came with it, it was clear that there are many possible side effects, but I'd already paid for the thing in advance, so I went ahead. I've had bloating, nausea, can't hardly eat, fever, feel sick all over since then. On top of this I'm being treated for chronic Lyme, and the treatment for that can cause you to feel like crap. I'm thinking about having it taken out right away not that I've read what you ladies are writing.