My 14 year old son and I both ate at the same restaurant but ate different foods. Within about 8 hours, we both became severely ill - vomitting, diahrea, stomach cramps, chills, sweats, weakness. I feel sure it must be food poisoning, but we didn't eat the same thing. Will this just run it's course or should we go to the doctor? We've been trying to drink plenty of fluids but even fluids seem to come right back up.