[Bella dolce]

Hello! Our Baby Bella Dolce is about 6 weeks old. we've had her for 2 weeks. She has lost 3 ounces- and now weighs 1.1 pounds. For the past 2 days she has had green diarrhea. Today she vomited twice. She is lethargic, not playful, and just looks out of it. She hasn't eaten solid foods in almost 48 hours. Won't drink much either. She peed about 3 times today- bright yellow pee. We had a funeral to travel to from Atlanta and she got sick on our 2nd to last day there. Took her to the vet this morning (Banfield/Petsmart) in Raleigh. Parvo test was negative. Worm tests were also negative. Rectal Temp was low/normal at 99.5. They didn't know what was wrong with her! We haven't changed her food. She was on Science diet puppy ground food- not hard. She wasn't crazy about it. The vet gave her Metronidazol and some Florifauna stuff to put on her food-which won't help because she isn't eating her food! I have been giving her Pedialyte this evening- she fights me and I give it to her in a syringe along with Nutri-Cal. She doesn't like either. I am so scared and I don't want to lose her. What do you think could be the problem? She's not been around any other dogs. Should I take her back to the vet in the morning? Could she need an IV drip or blood tests? Can she survive without solid foods? She's so tiny. What signs do I need to look for to tell if she's getting worse or critically ill? Shouldn't the vet have done more for her? Please- help us- I'm not sure what else to do?