Hi, I am a celiac. For the past 2 months I have been having reguraly oily film in my urine. It is also sometimes little foamy. The color seems to be as always, light yellow. I have also greasy stool, sometimes with undigested food in it. Do you know what the oily film in my urine might be a sing of? I am scared of some kind of serious liver problem, like hepatitis as I also have pain under my ribs and upper back. thank you