If I were you, I'd take your new yorkie in for a vet check tomorrow. This is what you should do when you get a new puppy anyways. I'm sure your vet will have alot of good advice for you and will also be able to check and be sure that your little one isn't getting dehydrated. You should be aware of hypoglycemia and how to treat it if your babies blood sugar levels drop. I battled with this when I brought Missy home before she was old enough to leave her Mommy. I wouldn't leave Missy's side for the first 5 weeks that she was home. You need to keep a really good eye on your pup. Also, I wouldn't have your new puppy around other dogs or on public ground. Puppies can easily catch illnesses/diseases before they have had all of their vaccinations done. It's better to be safe than sorry!
By the way, welcome to YT...and please share pictures when you can
