Sigh. I give up.
I had a Mirena once. I HATED it. I not only had the problems you had, but also it would slip and I'd have to go to the ER with pain so bad I thought I was in labor again. The third time that happened, I had it taken out. I'm a big fan of Depo Provera. I was warned that it can make you a bit lethargic the first couple of times you get a shot and that's where the weight gain can come from. I've been on it over a year and in that year, I have lost about 57 pounds (i'm pre-op). The beautiful thing, I don't have periods anymore.