New to IUD

I got Mirena placed on December 5. I hate to say right now I feel like garbage. I have always suffered extreme fatigue but it has made me more then tired then ever before. I'm also going through crazy mood swings. No amount of caffeine helps, no multi vitamin, superfoods, etc. still spotting too. I had a baterical infection as well that has come back. Cramping still (feeling of poop cramps no period cramps) I always get my blood and thyroid checked and doctors say nothing is wrong. I eat pretty good, lots of water and I'd love to exercise but I can't even move out of bed or my house. I'm so tired of feeling this way and now it's worse with the IUD. I was so hoping this would help but has anyone experienced this before? Help!!