Illogical reisistance to sleep

I don't want to go to bed and it's almost four in the morning.  I start work at nine and I have a long day.  This is more than slightly nuts.  At first I thought I was just enjoying a quiet house to get some writing done, but then I realized that I don't want to go to sleep because my sister in law heidi is having a Beta knife procedure to remove brain tumors tomorrow.  Odds are she will do fine.  I'm not even worrying exactly, but I think I have this "thing" that if I don't go to sleep the next day won't come and if it won't come nothing bad can happen.  DUh!!!!!!  THe only thing that will happen if I don't go to bed is that I'll be tired and do less of a good job tomorrow.  So good night.