Well, since you asked this like 15 hours ago, you probably ate it already or ate something else. But if it's a frozen dinner, or mac and cheese, something that doesn't really have fresh, fresh stuff in it, I don't see the problem.... You should be ok.
I have a two month old expired Kraft Dinner, and there is literally nothing good in my house to eat but that. Will anything bad happen if I eat it? Like, food poisoning or what not? Please answer quickly because I am damn right hungry. :/