4 hours of sleep is enough, rite?

I couldn't sleep last night because of a work decision that was made.  I sent an email back asking about it but either he went home or wasn't able to respond right away because he had to consult his manager.  It was a decision that made me quite angry but also put me in a huge bind with no notice.  Yeah, I know life isn't fair but it still doesn't stop me bitching about how it can suck sometimes.