Thank God, I think I'm past the worst of the holiday plague. Saturday night I did the whole fever thing, and it broke around midnight. Yesterday morning I went to Diana's and slept some more. We eventually went out for dinner with her dad (Winking Lizard), and I felt at least capable of human interaction.
Today I feel much better, though snotty (in the literal, not figurative sense). But at least I can assume that means I'll be functional Christmas day, thus invalidating the Christmas Curse theory.
I'm sitting here looking at the very poorly wrapped present I got Diana... I can't wait to give it to her. :)