There are various possibilities for paleness of stools like biliary diseases(obstruction,decreased synthesis, cholecystitis, gallstones,biliary cancer) , liver pathologies(like viral hepatitis,cirrhosis) , pancreatic disorders(
pancreatitis,pancreatic cancer) , giardia parasitic infection,cystic fibrosis , celiac disease
and topical sprue.
Are you having any other associated symptom or sign?
In my opinion,you should consult a gastroenterologist and get these possibilities ruled out one by one.