Welcome to YT!
I am not sure what steps should be taken. I just wanted to tell you that I'm so sorry that your baby is so sick. And getting sick so soon after coming home makes it worse. I'm so happy you took her to another vet. I will pray for a quick recovery.
I'm sure that someone who will have advice for you will come along shortly. I do hope that you will stick around our community. Its such a great site and everyone here has a great love of this breed. Again, welcome!