You switched to her from the clinic and liked her.
She was your only T away from the clinic. If you feel that you really like her still, go to the appointment and hear what she has to say. You havnt been seeing her for very long and she does not know you well yet so yes, you scared her when you talked the way you did when you were mad at her.

Listen to her concerns, apologize and see where you go from there. It may be a simple thing of an apology to her for your behavior.

If you want to, this relationship with your T can be saved. But if you get in there on thursday and listen and dont like how it sounds, then move on.

I guess your choices are:

Stay with this new T and follow the rules she makes.
or
Go back to the clinic and see a T there.