Skyla~ (Mirena) IUD~Side Effects?

Skyla is made by Mirena. It's smaller and lasts 3 years but it's the same thing other than that. 
​I'm having messed up side effects. I've had it in now for 4 months. My period is never consistent but that's not what I'm worried about. I read that it doesn't give you estrogen or something? And maybe that's why but I'm so hairy all over my body it's insane. And bad enough to want it taken out just for the struggle I go through to make body hairless. (Which hardly works) 
​Also I have a tilted toward the back uterus . So when it's that time of the month I never get cramps I get back aches and diarrhea. (Sorry tmi) but with the IUD the back aches are terrible!
​My question is if any of you have it? If the side effects go away? How long after till they go away? And what to do about the estrogen-hair problem.