Pain between bellybutton and groin. Similar to a knife being stuck into your gut. Enough pain to wake you up from deep sleep. Been following the FODMAP diet for 4 months, initially successful but no longer. No pattern to pain. Sometimes starts at about 5am sometimes about an hour after food. Am prediabetic but have been for years without constant pain. Can only think pain gets worse as you get older. I am a happily married 77 year old very fit male. 2 x 500mg Paracetamol capsules get rid of the pain for a least 12 hours. Recently underwent colonoscopy and endoscopy; all clear. Any suggestions?