You have had a CT and MRI which would have detected anything major, I believe. At this point, you seem to be very anxious about yourself and anxiety will feed on itself. With negative imaging and negative liver enzymes, I cannot imagine why you would need a liver biopsy. Maybe a Hidascan for a better look at the gallbladder. Are you taking any medication that could cause gastritis? Maybe take OTC prilosec or Nexium daily on empty stomach in the morning again. Be sure not to go hours without eating because that will allow unopposed stomach acid to sit in your stomach and cause irritation. Several small meals a day will help, I think. Remember, I am not a doctor. Just sharing my experience.