Paula - just feel better. Ifyou had the flu, it might be best to get some rest today and skip the exercise. Don't worry about the food. Just return to normal as soon as possible and the rest will take care of itself.
I'm not even op with food when I'm sick (like now) I am on a low carb plan and when I don't feel good i just can't muster up to eating protien. This is the time I let myself eat soup, or what ever I can muster down, then when I feel better, I go back op. And about a workout, wait till you feel better. That is what the trainer at the gym tells me.