How do you know if your puppy is recovering parvo? ?

This past Sunday, I found a stray wondering around a friends place. She was boney and looked very ill so I brought her home to care for her. After the first night, I knew something was wrong because she kept on vomiting out everything she ate. I took her to the vet the next morning and she was diagnosed with Parvo!! The vet said she may not make it, I couldnt let this poor puppy die because her previous owner was irresponsible!!! I told the vet to give her whatever she needs and to give me a list of things to do. I've been keeping her isolated in a warm area in my garage. For the past three days shes been lathargic, stayed in her cage, no movement whatsoever and she hasnt ate anything. Ive been using a syringe to give her a good amount of gatorade and pedialyte every hour since monday. Last night I gave her some peptobismol and cooked some chicken with a spoonful of vinegar and made some broth for her. Today shes up!! walking around and wagging her tail. She also ate the little amount of canned dog food and broth I left her. Does this mean she's recovering???? How do you know if she's fully recovered?? I asked my vet if I should get her checked again, but he said that I'd need to take her in only if she relapse. Pleas help?? I'm so happy, I decided to name her Roxy, I just want to be sure shes gonna make it.