I’ve had the Mirena IUD since December of 2016. I’ve had the typical pain during sex in certain positions and my periods have been getting lighter up until recently. I had a five day long period which is long for me even before the Mirena. I have no fever or chills that I can tell, but some bloating and a pain in my left lower abdomen, mostly in the front and not under the rib cage. It subsides and returns at different times and during different activities. Slight constipation.