I'm sorry if I scared you. I highly doubt she has Parvo, don't stress yourself out over it. She can contract it from being where other dogs have been but it's pretty unlikely unless there was a dog with Parvo LIVING in that area.. it's prevalent in their vomit and feces. It's easy to get but pretty unlikely.
The vet can do a test at the clinic but it's expensive and not really worth it if she's not showing symptoms. Especially since there's no reason to think she has it. Just keep an eye on her, she'll be fine
You're going to be a wonderful mommy.
PS -- your baby was born on my birthday!