What Causes Severe Stomach Pain,sulphur Belching And Diarrhea?

I had severe stomach pain, diaherrhea that was similar to projectile vomiting though it was from the other end, and seriously powerful sulphur smelling belches that were like air coming out of a hole in a float that someone s sitting on. This is the third time I ve had these same symptoms. The first two times I was on Victoza and the doctor thought it was pancreatitis (I also had vommitting at the same time with these episodes). This time I m not on Victoza and haven t been for several years and there s also no vomiting. An ER CT scan supposedly ruled out gall bladder issues or pancreatitis. Doctor thought it was a virus. No one around me has been sick with a stomach virus before or after this incident, including members of my immediate family who would have definitely been exposed to the virus through me. I didn t have nausea, just excruciating stomach pain that lasted two days. I m a diabetic on insulin.