I didn't get mirena, but I did get the Paraguard. It's non hormonal copper IUD. The only side effects were a really heavy period for the first several months. I had it in for about 3 years before trying to get pregnant. (In case you were wondering, upon removal I got pregnant ASAP).
@dreamsmommy15, I hope you continue to like it. I've heard of it getting lost and having to have surgery to remove it. Eek! I just don't want to gain the weight with it. Haha.
I had it 2 years, gained 40 pounds, always bloated, no period but was always uncomfortable and crampy. My husband said I became the devil. I did. hair fell out by the handfuls.