Stomach cramps HELP!?

ive been sick the past few days and have not eaten very much. i have a virus so i'm of course not very happy. i think these cramps are from lack of food because, i really haven't eaten in 2 - 21/2 days. every time i eat, i tried eating apple sauce and yogurt it still would give sharp pains as i was eating. would like a smoothie from smoothie king be good with lots of protein? i need advise on what to do and what to eat because they are starting to hurt really really bad.