I understand, I really do. I've felt that pain also, and it's so difficult. Just know that when it's time for her to go home, it won't be difficult for her at all. It will be difficult for you, but not for her. She will just drift off into a deep sleep, and her soul will leave her body and into the arms of an angel waiting to take her home.
God gave us these amazing creatures to share our lives with, to love and take care of, and they give us so much in return. They are truly a blessing and a gift from Him as He created them and He loves them even more then we do. I know, it's hard to imagine that anyone can love your baby more then you, but He does! He's their father too and He will take care of your baby until you get there.
I don't know if you've ever read any near death experiences, people who have died and visited heaven for a short time, met loved ones that passed away, and many have visited with their beloved pets in heaven! They got a chance to see them in heaven and spend a moment with them, so we can be sure that all of our babies are there and just in all their glory, not needing one single thing. Just as wonderful heaven is for us people, it's equally wonderful for the animals too.
Trust Jesus with your baby, and He will take care of her until you get there.