Still on Mirena - terrible Indigestion

I still have the Mirena device inside me since Oct '09. A week a half ago, I started to have indigestion/heartburn that has not gone away since. It is with me 24/7. Did other people witness this as a side-effect? I thought I saw that someone else had this problem. Please let me know. I need to make the decision once and for all to get this removed. Thanks for your help!