I'm surprised the person you bought her from did not tell you to get a vet check w/in 3 days. When I sell a pup I have it in the contract to take to vet even though all my pups are checked by my vet. That way you get to know your vet & vet gets to know pup. Also if everything is not aok you will know.
Anyway, welcome to YT. And would love to see pix of your little girl.
