Help! How can i heal my puppies cut!?

my week old puppy has a deep cut on her back (the cut is the size of a dime), i don't know what to do since i can't go to the vet until 4:00. I've been treating it with peroxide and i wrapped her up in a paper towel to keep infections away. Is there a veterinary tip line i could call? Or does anyone know what else i could do to help it heal? Please help me, i don't want this puppy to die to!