Can't believe i missed this thread. You are such a good mommy and have a good heart for taking her in. Poor baby
She must have been so scared, you said she hides her tail bet. her legs, thats a sign of fear which makes me think the other lady that had her prob. didn't treat her right, but with you caring for her now she will learn to trust and prob. will show her true personality in no time. Let us know how the vet appt. goes