Levonorgestrel
"I have always had really heavy periods and when I was in high school I thought I was normal even though I was changing a super tampon every hour. Turns out high school girls exaggerate about their symptoms. I went onto the pill when I was 18 to deal with the bleeding and upset guts. It helped a little but I still got upset guts and would bleed for a full 7 days (still using those super tampons). I have had the Mirena for 1&1/2 months Granted I have only had one period since its been put in but it was a grand total of three days and I barely needed a panty liner for it. I had no upset guts. The only thing is if I have too much sugar (chocolate bar and a pop at the same time) I will get really bad gas pains. So I guess I just won't eat that much sugar anymore."