Hi. Thanks for your query. Read your history and understood your problem. Your history is classical. The pain starts on eating, goes through back and then under the breasts. Occurs every time you take food. This indicated it is related to either esophagus, stomach or duodenum. You are already diagnosed as a case of diverticulitis on colonoscopy. The possible reasons can be : Diverticulitis as a reflex of an inflammatory process to the food in to the stomach. Esophagitis, gastritis, stomach ulcers or cancers. Pancreatitis as the pain is referred to the back. Gall bladder infection or stones do not cause pain referred to the back. You should go back to the Gastroenterologist: Get upper GI endoscopy CT scan of the abdomen and if required MRCP. Blood- CBC, liver and kidney functions. / Urine and stool tests Serum lipase and amylase for pancreatitis. The exact diagnosis will give the guideline for further investigations and treatment. Till then get started on : Zantac 12 hourly. Pepcid every 3 to 4 hours when on empty stomach. Add Domperidone or such motility regulators. Soft bland diet. No aerated colas / soda/ drinks. Early dinner. No late nights. Treatment for anxiety (as prescribed / needs a prescription by your Doctor) Lying in a reclining position Walk around after dinner. Think of the factors which increased the present problem, GERD, anxiety and try to avoid. If no relief, get Upper GI endoscopy done and get prescription for added Medicines. I hope this helps you to get a relaxation and time to get investigated well.