Last Sunday I woke up about 1am very nauseated, threw up, then felt fine (with the exception of having diarrhea until about 10am). By 6pm I felt fine, just tired. Monday I felt fine, I went out and did the normal activities. Today, I was tossing and turning in bed because I was feeling nauseous, I just threw up, and now feel completely fine. I ve not had a fever during any of this. Is this anything to worry about?