Is there over the counter medicine i can use?

Get diagnosed first: Diarrhea (loose or watery stools) can be from variety of causes. People usually see their doctors if symptoms are bad or if they last more than 1-2 days (as in this case). When diarrhea first starts happening, a person can benefit by stopping eating and start just drinking small amounts (few ounces) of something like Pedialyte, each hour for 1 day. For symptoms beyond that, one's doctor evaluates.