So I got my first IUD (kyleena) almost three weeks ago and I am still feeling a lot of pain. It comes in waves and if I move a lot during my day (walking around a lot, exercising) then it gets a lot worse in the evening. It almost knocks me over and makes me feel lightheaded and nauseous. I think this is normal but I don't really know how to stop it. I've taken medicine, used a heating pad and a few other basic things for cramps but they don't really seem to help. Anyone else had this happen?