Open Question: I have pain in my guts and in my pelvic area..?

I have the 5 year IUD. It has been 4 years since I got it. 3 months ago, i went to the dr to get the IUD removed and he told me that it had gotten embedded in my uterus wall which it can sometimes do. Since then, there have been many changes in my life which has not given me the time to go to the specialist to get the IUD removed. For the last several days, i have been having cramps in my pelvic area and now today my guts ache. In the past, I have also had kidney stones. But this does not feel like kidney stone pain. Could it be the IUD or something more servere???