Hi, I ve had severe, diarrhea, nausia, stomach cramps and a headache over the last few days. The other symptoms seem to gradually getting better but the headaches are now far worse. I ve tried drinking plenty of fluids, and restricted my eating to small bits of easy to digest food (such as apples and toast) after not eating for a day or so. Any advice? Any idea what it could be, and at this stage would you recommend going to see a doctor? Many Thanks, Brian