My husband has a pancreatic mass (cancerous) on the head. Just finished chemo and radiation last week, hoping for whipple surgery in February. Was feeling better, had vegetables and tofu at Thai restaurant, 4-6 hours later had sever heartburn, gas, belching, then 12 hours later threw up. Trying to get down water, throat was constricted and he felt sick. Has been in bed all day. Is this food poisoning or pancreatic attach? No fever and no cramping