I think you need to decide what you WANT TO do first.
in other words.... would you spay her ? Or this not an option? Curious what kind of help you are lookin for.
I dont want to sound mean when i give my opinion.. but if you really dont want to risk her life, she needs to be spayed.
But then again... why do you have two unfixed yorkies in your home? Were your plans to breed?
You dont even know if she is pregnant yet, so the best thing to do would be ask your vet if she can be spayed asap
How big is she? ANd how big is the male? just curious, although either way, 7 months old is too young. She is still a baby herself