Hi !
I am actually up at this time...beacause myself too my yorkie has gone into labour...congrats on the little yorkies!!
Here is a website that i found on YT...
i hope it can help while you are waiting to hear back from your vet...
Hopefully by now you have heard back from your vet...or everything is going smothly.
but if not hopefully it will put some of your worries at ease...
http://www.debbiejensen.com/
Basically one thing i always go by is that always go with your gut instinct and it's better to be safe than sorry,
I hope all goes good! A Healthy mommy and babies!
My little yorkie is digging away...so they'll be coming!
Take care
a Good Luck!
Natacha