What Is The Cause For Yellow Floating Stool?

I have yellow floating stool, I had blood work done which revealed a normal liver panel, normal pancreatic enzymes. A urine test was also normal and I have no sign of jaundice. I had an abdominal ultra sound that was also normal. I have sometimes a burning pain in the mid-lower abdomen, especially during the night but sometimes also during the day. The doctor told me to take prilosec which has helped a little but not completely. Sometimes I am a little nauseated. Because of the yellow stool I am concerned about the pancreas (pancreatic cancer?) This has been going on for several weeks. They yellow stool is there consistently for the last 10 days.