I am sorry that you have lost a puppy. I will not bash you, but just say that I hope you have learned that you have a lot to learn and that breeding is something that should not be taken lightly.
I hope that you will take at least a year to learn all you can about breeding, before you attempt it again.
The best advice that I was given when I first asked about breeding, was to buy a couple of good books and read them cover to cover, several times. Study them like your puppies' lives depended on it.
In addition read this Breeders forum, read all of the posts about things going wrong and the advice that is given. Advice from the experienced breeders, not advice that a newbie is giving out.
Get to know the breeders so you know who has the expertise and who does not. If you have read or heard conflicting advice, ask them why they believe what they do. Take notes and learn,
http://www.yorkietalk.com/forums/bre...-breeders.html