I am experiencing discomfort in my stomach area when sitting. I do not have this fullness and pressure when standing. I have been checked for H.pylori which was neg, prescribed Prilosec for several weeks - no change.Most recently started on Bentyl - but still feel the same.no change in bowel habits, just pressure when sitting. I have had no previous medical problems,, 37 yr old male, 5 ft. 11, 160 lbs, no weight loss