I agree with the workup this far, and indeed, gallstones can uncommonly lead to the symptoms you describe.
Further tests can include an upper endoscopy, which is the most thorough test of the upper digestive tract. I would discuss this option.
Another consideration would be a HIDA scan with CCK stimulation, which would evaluate the gallbladder ejection fraction. A low number can lead to persistent nausea.
These options can be discussed with your personal physician.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin Pho, M.D.
KevinMD.com
Twitter.com/kevinmd
also, i just tried some rice milk with cereal as normal milk makes my stomach burn and my stomach is still burning slightly, what could be the cause.