It is doubtful that the stomach polyp is causing your symptoms. As for anything to worry about - this can be done if they biopsied the lesion during the endoscopy.
GERD, an ulcer, or inflammation of the upper digestive tract can all lead to the symptoms you have described. A 24-hr pH study can be considered to conclusively give a diagnosis of GERD.
You can also consider Sphincter of Oddi dysfunction, which can cause RUQ pain. This condition can be more common in those without a gallbladder. If your GI doc suspects this, an ERCP with Sphincter of Oddi manometry can be considered for further evaluation.
You can discuss these options with your personal physician.
Followup with your personal physician is essential.
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, M.D.
Medical Weblog:
kevinmd_b