Please take baby to some known vet and get the kidney function checked KFT LFT test done...I could not get it done timely and my baby today not with me ( read my thread ) also of your baby stops urination run to a vet for immediate treatment...pl update your baby health here ...I am concerned
Your question was a few days ago, and I am wondering how is your little dog now?
Everything you described points to her feeling very unwell. When a dog who is usually fit and well suddenly shows all those symptoms, then the only answer is to take them as quickly as possible to a vet for tests.
I hope your dog will be okay.