Hi. Thanks for your query and an elucidate history. You have a classical history and you should not wait, You should see a General Surgeon preferably with Gastroenterology specialty to get a proper investigations and diagnosis. My probable diagnosis would be as follows as per the history you have provided: -Gastric Ulcer -Pancreatitis -Volvulus of the stomach -Rarely some problem of the bile ducts, aorta ans so on. I would advise you the following in such a case: X-ray of the abdomen in standing and lying down position. Ultrasonography Upper GI Endoscopy CT scan of the abdomen to confirm the findings. The treatment will depend upon the diagnosis on the basis of clinical history, physical examination, and investigations.