I will only say this one last time, since you've grown attached to Nylah. What the breeder did in making you pick her up at 6 weeks of age was cruel, inhumane, and criminal. I would still look into reporting the breeder to the police, making sure that they still allow you to keep Nylah. The only way that breeders will stop being cruel and unethical is by facing fines and jail time.
Okay. Now that you have Nylah at a young and vulnerable age, you will have to be her mother for the next few critical weeks. Please try to be around her as much as possible, nurture her, and show her plenty of love and affection--that's what she will be missing from her mother.
Be sure to take her to the vet and have her checked out if you haven't done so already, and let them know her age so they can help you with suggestions for keeping her healthy during the next few critical weeks. Be aware of the signs of hypoglycemia (low blood sugar) such as trembling, fainting, and pale gums, and have some Karo corn syrup (or Nutri-cal) on hand so you can rub a little on her gums if she shows any symptoms. Your vet will be able to instruct you on the proper amount to use (you want to use enough, but you don't want to overdo it).
Learn the phone number and location of your nearest 24 hour emergency vet in case Nylah runs into any problems outside of your vet's regular office hours.
And please continue to take and post plenty of pictures of Nylah as she gets older
. It's possible she could be a pure bred Yorkie at a very young age. We'll be able to tell you better as she gets older. And even if she isn't a pure bred, she's still an honorary Yorkie on Yorkietalk, and we will continue to help answer your questions and share in your joy as she grows up.