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.
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