Gray stool is NOT normal! Please see your doctor as soon as possible. Are you still having stomach troubles as you were before? I know I suggested it before but now I'm being more firm. Please, please see a GI dr. Gray stool can indicate an problem with your liver, gallstones, pancreas, or a blockage of your bile ducts, etc., all of which can be serious. There can be other reasons for it including medications but since you have been complaining of chest pains and digestive issues you need to be soon ASAP!!