Hi, I ate some oysters last Monday and felt fine. Later in the week I felt very nauseous but have not been sick. I have also had diarrhea and some stomach discomfort and tenderness. On Friday I felt ok but then yesterday I felt nauseous again and then last night I had stomach pains, and indigestion and heartburn, and very watery diarrhea which was grey in colour. I feel a bit better today but still a bit queasy and my stool is now a bit more formed but still grey in colour. I do not have a fever, headache, rash or anything that would appear abnormal. I am hoping it will just go away but I am concerned that there might be something more seriously wrong and perhaps it has nothing to do with the oysters? Should I see my doctor, please advise? Thank you.