i wouldn't stress out over the staph infection. Luka had the same issue, my vet told me i could clean it with a simple astringent but it would more than likely go away on it's own. It was all over his belly and it did wind up going away after a couple of weeks. He said puppies immune systems are not as strong as adults so they get it a lot easier. Just keep an eye on it but unless you really want to I personally think you would be fine to wait before a vet visit.
sorry that your breeder is being so uncooperative, that sucks. I hope she pulls through and all her problems resolve themselves.