I just ate flaming hot cheetos and...?

I just ate some flaming hot cheetos and drank a bottle of pepsi. Now, I feel so nauseated I can barely stand up.. Its not so bad when I am sitting or laying down, but I have to like lean over when I am standing. The flaming hot cheetos usually give me heart burn cuz of, well, they r flaming hot. they hav never done this to me before. The expiration date is January 12. Any ideas of what could be wrong?