About a year and a half ago I had my IUD changed, it did not feel right when she replaced it. I called a couple times and she said that it was all normal side effects. Ever since I have had stomach cramps, feels like gas but way worse and back pain going into my sides. These were random up until about 4 months ago and now they are more then not. I get really bad headaches and my periods happen a couple months then I dont have them for a couple months. I have had random itchy spells. They have done blood and urine tests and have not found anything. They say it is not my kidneys, gallbladder, appendix. Could this be side affects of the IUD?