maybe you are anxious because she is new and you don't know her very well. so you aren't sure what her pattern of behavior toward you will be or how she will be over time. maybe there's some fear about her becoming like the old one, who just sounds like she was a bad T.
but if this new T has done nothing bad and has been only kind so far, remind yourself (should I say, yourselves?) of that.....use what you know to counteract what you feel.
the anxiety is normal, though, and understandable. I have felt it before too.