It's a terrible shock isn't it, when therapy ends so abruptly, especially if there was no indication that anything like that was about to happen. I'm so sorry you are going through this. It does damage our ability to trust again, particularly another T.

You haven't said what the reason was for your therapist ending things and of course you don't have to disclose it here, but I wonder if you would feel able to ask her for a closure session, or if not an actual session, just for her to give you a reason why, so you can work through it with new T?