No More Tylenol PM

I have a recurring dream. I continually forget to go to a class on Thursday afternoons. When I wake up, it takes me a while to figure out that it was just a dream, but I still feel like I have forgotten something all day. What do you suppose that means? Does it help when I tell you that the class is some sort of science, which I haven't taken in four years, and it's taught by one of my old English professors? Didn't think so.