i have bouts of major discomfort in upper abdomen that sometimes last for several hours and then, after taking gas-x and pep, just dissipate. Last November i went to a minor emergency facility, where X-rays and blood tests were done, and the doc said all he could find was gas. I have been eating mostly bland foods, but about once a week or every two weeks feel the need to take gas-x to prevent major discomfort. What should my next step be to figure out this problem? Thanks!