I was just given a puppy I don't know the breed but she is small and when bathing her I noticed two white pus bumps on her stomach

Puss bumps? Are they open and oozing? If so, she needs to go to the vet.

If they look more pimple-like.. express them. Dogs get sebaceous cysts (pimples) just like people do at any age.

And because you were given a puppy with no known medical history, I would advise to take her into the vet for her first set of shots. Parvo is not something you want to mess with.