I am a 68 yo male w/ history of IBS and GERG. Last year I was hospitalized for severe stomach pain, vomiting, nausea. I spent a month there, but no cause was found after doing a gastric emptying study, an upper GI, etc. I still have this. My stomach is nauseated every morning and does not let up till 2-3 in the after noon. I have cut out gluten and lactose, no effect. I take 4omg omeprazole twice a day. Any idea what this is?