I have been experiencing significant abdominal pain (ie, burning sensation), loss of appetite, weight loss (7 pounds) and constant nausea (with one bout of vomiting) in six weeks. I had an endoscope, CT scan of the abdomen and pelvis with contrast dye, blood tests, including liver, pancreas and gallbladder panel, urine and occult fecal blood tests, all of which did not reveal the presence of any organic disease or the cause for my symptoms. I have been seen by two gastroenterologists and an Internist. I am sixty five years old.Any recommendations