My worst nightmare: math, aparently

I keep having this dream that I've got a test that I'm going to have to take for a class that I'm in, but I'm waaaay behind in the class and can't even remember having been to the class. Every time I've had this dream (I think last night makes four times) it's been some sort of math class, and I never end up actually having to take the test, but the whole time I'm dreading it and wondering if it's even possible to get caught up enough to take it. Weird.