Welcome to YT.
These pictures show pics of yorkies from birth to 15 years. I hope this will help. Have you taken your puppy to the vet to have a health check done? If not, you should do so.
pictures
I'll also leave the following link. If you go to the bottom of the page, there are many questions you can click on to get answers by someone who was very knowledgeable about yorkies.
Alex's Yorkie Care Frequently Asked Questions