19 year old male. For the last two months, I've been plagued with a burning pain under my right shoulder blade. The pain varies in duration and intensity, but usually several times a day. My stools are varying too. From yellow, to dark brown to green. Sometimes thin, sometimes loose, sometimes firm. Blood tests show a slightly elevated liver function. A CT scan showed no abnormalities. Could this be my gallbladder? I'm at my wits end...