Hi, i have had stomach problems for the last six months. It started with a constant feeling of nausea, which turned into constant vomiting for at least a month. Then it turned into very bad heartburn and some vomiting. Then it turned into heartburn and bad constipation. Now its slight heartburn, burning in the lower abdomen,constipation and terrible gas. I've had blood tests,urine tests a sonargram, xrays and an endoscopy but everything has come back okay and no Doctors seem to have any idea. I have tried different diets and cut out any bad foods but no change.