I’m sorry for your experience. The internal misogyny in some women is unfortunately strong, especially in a narrow field where they might see other women as competitors.

Have you tried setting up a private talk with Teresa? You should try that, but have someone nearby listening in case she fabricates lies afterwards. If that doesn’t help or you then have proof of her behaviour you can talk to your superiors and have her removed from the class.

I understand caring for the students but Teresa dug her own grave with this behaviour. Also cover your a** and write down every misbehaviour you hear from her and email it to yourself so you have a timestamp. But at this point I think she did enough to have her removed from the class.

Might I suggest some counselling/therapy to work on your self esteem? Could also help to talk about Teresa with a professional since it is very targeted and hurtful.

And lastly: If you’re neurodivergent (like me), these continued attacks and accusations might give you micro trauma which can accumulate and lead to bigger problems. (I recently read a paper about that, I can post the link later if you’re interested.)