The discolored stool may just be from something you ate. I know there are times that when I eat chicken my stool is also lighter than usual and often a yellowish color and if I eat red meat it tends to be darker.....more normal. I wouldn't hesitate just yet. See if what you're eating may be the answer. If it really gets to bothering you maybe you should consult a doctor. Just a suggestion.
Pale Stool 
Linear Mode
