birth control
"I have had Mirena for 3 months now.  Insertion was unbelievably painful (I threw up and had to lay on the table with my eyes closed, pants still off, for almost an hour before I could even consider standing up). I bled very lightly but continuously for the first month but have now resumed a more normal (though extremely light) cycle. I rarely had cramps before insertion however now I usually have 1 day of TERRIBLE cramps (which subside only with 800mg Advil). Other than that I have had zero weight gain (I've actually lost 5lbs), no acne (something I was worried about because I have sensitive skin) and only slight moodiness around the time of my cycle (I would get moody at this time before I had Mirena, also). Overall, a good experience."