I had that nightmare about missing the most important college class ever's final exam because I hadn't ever even gone to the class. I woke up, remembered that the State of Michigan had given me my English certificate, and that even if the dream were true, I have the paper in my hot little hands to play the "I beg to differ" card.

Like you however, I spent the rest of the night staring at the ceiling going "Crap. Crap crap crap!"