3 week uper abdomin pain. Full aftr eat. Nexium (esomeprazole) zantac pain beter but feel full aftr meal wnausea. Pain undr left rib on of. Constipation. Pancrtic cancer?

Unlikely. Pancreatic cancer is unlikely in someone 35 years of age. Continue antacids and avoid alcohol and carbonated drinks. If the pain does not settle down in 3 more weeks, see a doctor for medical examination. He/she may order a Ct scan of the abdomen to be sure there is nothing like a cancer hiding in the abdomen.