You're one of the lucky ones... and no scolding
cause I can see you already know that probably wasn't the best way to get your new puppy - you were probably way overcharged but that's beside the point ...I've heard people do get healthy puppies.... but there are many people who go thru heartache because pet stores buy from puppy mills & many sick puppies are shipped into pet stores. THAT in itself is something to always think about.
I hope you have a healthy and happy puppy and what's done is done - don't beat yourself up about it and enjoy your puppy. Congratulations and I hope you share some pictures soon.