I have frequent heart burn and an uncomfortable ache most of the time under my right ribcage. I have had an mri, ultrasound, gall bladder tests, an endoscopy, and an exray. All tests came back ok. Looking for any possible reason why I am still having these symptoms. I have had this problem for about two years. condition worsens when sitting for long periods or I after eating a bigger meal. Exercise and work does not bother me, and as long as I am standing or walking or in upright position I seem to be fine.