Oh, dear. Yorkie puppies should stay with their moms until they are twelve weeks old. Your baby is way too young to be away from her.
Did your breeder or vet warn you about hypoglycemia/low blood sugar? Young puppies are at great risk for this. Shivering is a sign of it. You need to get some Karo syrup, pancake syrup, even jelly, some sugar into him asap, then call your vet right away. This can be a life threatening situation.
Here is some information about it:
http://www.marvistavet.com/html/body...oglycemia.html