I've had severe gastritis and diarrhea for over 2 mos. and have gone off antibiotics, neurontin, and celebrex during that time. Have had a negative CT scan and many negative blood tests (including hepatic panel)- except for high glucose - and negative culture for H. pylori. The pain is nearly constant in some part of my mid-abdomen, but is horrendous when it goes to my back, left of spine, above the waist, and lasts for hours - usually starting in afternoon, and worsens with lying down. Can't get in to see the G.I. specialist for 6 weeks - and in the meantime am suffering daily. Sometimes, before the really bad back pain starts, I feel pressure on each side of my waist, as if someone was squeezing me with 2 hands. If I breath in deeply, pushing out my diaphram that internal pressure gives a tiny bit of relief - but only Hydrocodone 7.5-500 alleviates the worst pain for about 4-5 hours. Having ruled out liver and pancreatic cancer, but still suffering, what are the most probable diagnoses? What happens next?