Discomfort Question

I have been having discomfort in my upper and sometimes lower right quadrants of my abdomen. I also had a slightly high biliburlin count last time I went to the doctor. We then did hep tests and such, and an ultrasound. Nothing was found what so ever. Could these "pains" be all in my head or what? I notice them more after eating, and I eat quite a bit of fatty food. I'm a college student so i'm also stressed. I'm 5'8" and weigh about 157. Anyone have any ideas? Should I go back to my doctor even though the pains aren't that serious (definitely more to the mild range). Before them finding my biliburlin to be high, I don't thin I would've even though a second thing about pains this mild, but they have been slightly persistent (ie. I notice them almost every day). Thank you for reading.