I bought a german shepard puppy, This dog was in my home for a day. And the next morning she whined and barked for an hour. Then she started walking and going limp, and shaking, now this dog cannot hold up her head. The lady that I bought it from is saying that I have abused it. I have not what is wrong with this dog.

I don't know, you don't know, and no one on line is going to be able to answer that question. The dog needs to be at a vet, now. That's the only person who can answer your question.