I am suffering with stomach problems which have gone on for over a year. I have had every test imaginable, and nothing shows up. I have a gnawing, hollow, empty feeling to the left of my belly button, and below my rib cage. I have a tremendous amount of stomach gas, and can burp continuously for a dozen times. Usually, food comforts it, but lately that doesn't even work. I take 40 mg. of Nexium twice a day, but am unable to take any antacid as I am also on coumadin. I am in misery and feel like vomiting many times, but have not as yet. I am in misery. Any ideas?