By talking with her, seeking clarification about her reaction, and listening to her direct response to your question instead of trying to guess how she felt about you by your interpretaton of her facial expression. You will probably continue to feel this way unless you talk to her about it. Perhaps she was not judging you at all and you misinterpreted. Wouldn't it be terrible if you threw away your therapy relationship because of a misinterpretation?

I am going through a divorce. An issue has been my husband's infidelity. It was very harmful to our marriage. So one day I mentioned to my T, whom I knew very well by then, about a past relationship in which I was the "other woman" with a married man. He was clearly surprised, even a little shocked, that I had been in that role once, especially given my current situation, in which it is so obvious that infidelity has been damaging. I think if I had known my T less well, I might have interpreted his reaction as judgmental. But I know he is not like this. I told him, hey, I was young, I really didn't understand what I was doing, and it is not something I am proud of at all. But I'm not going to beat myself up about that. I wouldn't do it again today. We moved on and this did not cause a rift between us.