MY CAT JUST GAVE BIRTH WHAT DO I DO!?

my cat has been pregnant for a little while now and she HAD HER FIRST ON THE FLOOR AND ITS MAKING REALLY WEIRD SQUEAKY NOISES AND ITS GOT SOME KIND OF LIVER COMING OUT OF ITS NEAR RECTUM!!! WHAT DO I DOOOOO!?!?!? P.S. My cat is less than a year old(so yes some neighborhood pedo kitty got to her).