I have no special experience in this field. But my feeling is that you should not take this task on. I realize this may come across as harsh, but I really do have a lot of sympathy for you in this situation you've described. However, in the situation a you've talked about it, I think that the potential costs to you outweigh any potential benefits.

As you have described this situation, you have a strong moral and ethical and even legal case.

However, if you pursue this, you will incur huge costs in time and emotional stress, not to mention it will undoubtedly cost $$$.

As you have undoubtedly realized, a person with documented mental health issues has little credibility in the eyes of authorities. As you've described your situation, you can easily be portrayed as someone who is unstable and untruthful, even if both those things are completely untrue.

And the only actual proof you have is something that your therapist told you in session. And you've described your therapist as someone who also has had conflicts with this center.

Credible proof would be contemporary documents. For example, if you had copies of emails in which people at this clinic were discussing you inappropriately, that would be proof.

A discussion with your therapist is not proof, regardless of the truth of what she told you.

And you say that you may be placing your housing in jeopardy? And are about to undergo major surgery that will require substantial recovery time? It sounds like those are the things you should be putting your efforts into.

I think that in practical terms, going after these people is just not worth it.

But you should definitely talk about it with your therapist.

Take care,
-Far