I would give her something to chew on... Have you heard of bully sticks? Raw hides are a big no no in my book because they can tears off and get stuck in their throat

.. Bully sticks are great because they don't break off and my Izzy LOVES to chew them. Try squeaker toys, she loves those also..
When she is trying to bite your face you need tell her no and distract her... But not to loud so she's scared of you

Normally Yorkie pups are left with their mother till they are 12 weeks old this very reason. the mother has a way of teaching them about biting her of others pups.
Congrats on your new fur baby!! They do have a way of stealing your heart unlike any other pup