I've been having a upset stomach, watery stools, chills, and feeling lousy since last monday what's wrong with me?

Gastroenteritis: This combination of symptoms suggest viral gastroenteritis which runs its course in a week or so. Treatment consists of resting, good fluid intake, avoidance of harsh roughage and spicey foods, and taking kaopectate (kaolin and pectin) as needed. If symptoms persist or worsen, stool cultures are Indicated to look for bacterial and parasitic infections which require treatment.