This sounds exactly like my situation! I have an almost definite diagnosis because of a copper iud I have for a collected 4 years. It started the same way for me and turned into pancreatitis. The first ER dr didn't check my blood and just assumed it was IBM after the xray. Gave me Bentyl and it almost killed me! 1.5 years of drs that just want to do tests and now I'm suffering greatly because I had no idea and decided to cut red meat out of my diet. My levels went through the roof and I'm now suffering going through the "dumping" process =(