I have been having intermittent pain in my right chest/breast area that often goes thru to my back, behind right shoulder blade. I also get epigastric discomfort, at times a gnawing hunger like pain. Going on for a year or so. Occasional nausea, no vomiting. Occasional diarrhea but not too often. Started on omeprazole 20 mg daily, eventually went up to 40 mg daily plus ranitidine 150 mg daily. Still very frequent discomfort. Now on Nexium and ranitidine 150 BID. I think this is some heartburn but never really have burning or taste of acid in my throat. Can't tell what makes it worse or better except walking seems to make it worse. Had abdominal ultrasound. Normal except prominence of pancreatic duct, 3-4 mm. I really feel this is either GERD or gallbladder, but again ultrasound showed normal gallbladder. Also liver, pancreatic enzymes all normal. Suggestions? Could this be due to pancreas? Would the ultrasound have shown a mass if there is one in the pancreas? Further test should be? EGD? Hida scan? ERCP? MRI? Help!