Hi! Welcome to YT! Have you had Cady to the vet for a checkup since you just got her 3 weeks ago? How old is she? If it were me, i would take her in for a thorough checkup. If she is a puppy, she is probably due some shots or something and you can have her checked out then. Did she come with a shot record?? It will tell you when she is ready for more immunizations.
Good luck!! Post some pictures of your baby too!

If she is a puppy, i would recommend getting her spayed between 6-12 months of age so that she doesn't go into heat. That will help prevent some cancers later on in life.