Sorry to hear you’ve been dealing with pancreatitis along with all the other stuff. That’s one thing I have not experienced yet.
I have had the ripping lower abdominal pain, though. I always chalked it up to EDS-related round ligament pain. If I am not careful getting up from a supine position, I get an excruciating tearing/ripping pain in the vicinity of the round ligament that puts me into a crumpled heap on the floor. It only lasts a few seconds, but owwwwwwwww.