I was looking forward to bringing my baby home in about a month, but all of a sudden all 5 puppies in the litter died

When I talked to the breeders as of yesterday they did not know the cause.
I am so heartbroken, it took me forever to find someone I trusted to get a yorkie from and now I have to start my search all over. I am getting VERY discouraged that I will ever find me a baby. I am getting desperate to the point of thinking about buying one online even though I really want to avoid that if at all possible! Did anyone else have such a hard time finding their baby