There's a Screw Loose Somewhere.

My Body clock's all screwy. I wake up at a civilised hour, say 8 o'clock. I can't get back to sleep, but am completely exhausted and can do nothing but stare into space or eat, until by 3-ish, as I start to feel really fat and lazy, I suddenly spring to life and become a productive whirlwind. And I can't snap out of it until maybe 3am, if I'm lucky. So, then I crash, and it begins again.