nocturnal means active at night, it doesnt mean that you DONT sleep.... so..probably you sleep in the morning/afternoon?
Ever tried sleeping pills? i never used them myself but i wonder how they work.. do they just make you drowsy? and how would you feel the next day? and do you wake up when the pills effect are gone?
I usually think about random things... if I were playing WoW before I went to bed... then I'll be thinking about that... -lol