Could it be that you are just a bit burned out on it all? It can happen. I think that for an event like rush, whether NPHC, NPC, or MCGLO, it can get to be soooo consuming because you have to make sure it all goes well for the duration of the rush. That is a lot of pressure and stress to have to live through.
Don't feel bad. Just take a few steps back and let your sisters 'drive' for a while.