AH HA this is exactly what has happen to me!!!!! I got sick with strep throte, but i'm hypo-manic so i can't sleep....well your body has a way of knocking you out when it's DONE. The one day first day i got sick...i fell asleep at work for 2 hours? Got home at 8 and went to bed...woke up the next day at 8am or so...and only stayed up till 10am before just going back to bed. It's really a strange feeling...i mean your body is exhausted but your mind is like what the hell do you think your doing ...i'm not going to bed.