I've never dealt with parvo so can only go by what I've read. From my reading, there are definitive tests for parvo but often only a tentative diagnosis is made as the treatment is supportive therapy based on the symptoms. Here's a little something.
"Diagnosis
Although symptoms can be very suggestive of Parvo, true diagnosis requires an antibody test that detects the actual parvovirus in stool samples. The test is an ELISA test or enzyme-linked immunosorbent assay. Early in the disease, this test can be negative. Virus isolation is possible but the procedure is quite expensive and rarely done. In practice, the presence of an acute hemorrhagic diarrhea is usually all that is required for a tentative diagnosis of parvovirus".
From this link...
Parvovirus In Dogs - Parvo In Your Dog
..and here's another link...
Diagnosis of Parvovirus
Given what I just posted, I can see why vets would just treat the symptoms rather than look for a definitive diagnosis. I do think a definitive diagnosis should be sought, however, as this disease is so easily spread.
The OP saying the vet 'suspects' parvo and the OP saying now she has 'none' seems to be what some are hinging their suspicions on. Y'all might be right, but 'none' could also mean that she has no puppy now. The OP does have a brief posting style that reminds me of a twitter, so not much info is on any one post.
I just wish that suspicions would be held in check for now as all we KNOW is what was posted and everything else is conclusions based on assumptions. It seems a little more compassion is in order for now, rather than being right about whatever suspicions one may have.