My son, 4, had stomach pains saturday, eventually vomitted that night a couple of times and seemed better the next day. Started with stomach pains again Tuesday night, and had a very light colored bowel movement . Woke up the next morning with very light colored diarrhea , which continued through the day. He had very little energy. Woke up today seeming better, but now back to very little energy and lots of light stool . Is the color of the stool something to be concerned about?