I am on vacation and after one day of eating sushi which included raw salmon, I had terrible diarrhea. I took 2 expired pepto bismol tablets because it was all I had and now a day after, every time I eat, no matter what it is, I have what seems to be an allergic reaction. I get very hot and sweaty, lightheaded, and dizzy. It gets harder to breathe and my skin on my chest gets very itchy. My face gets red and flush. Whats going on? The first time if happened was after eating chicken and broccoli, cooked at home. The second time it was with crab and shrimp. Now after just eating mac and cheese I got very hot and sweaty and itchy again. Please help.