Anyone with prior abdominal surgery who has severe pain and a bunch of negative tests: Get Carnett's test ASAP! It is very possible to have nerve entrapment, especially if no other testing is significant. Carnett's test is simple and straightforward--I even diagnosed my own severe abdominal pain that had been dismissed for 3 years because no physicians knew that abdominal WALL nerve entrapment is significant cause of "abdominal" pain and don't know about Carnett's to help diagnose it. Don't go chasing rare possibilities until abdominal wall pain is ruled out!