As the other attorney stated you should consult with an attorney in private to see if y do in fact have a cause of action against the therapist. You would be looking for a personal injury or medical malpractice attorney. You can find several not he find a lawyer section of this site and many offer free consultations. Good luck.
Take your allegations and evidence to an attorney for review. Be prepared to pay for the consultation.
Therapists are entitled to their impressions and opinions, and to change them over time and as new information becomes available or known.
That you disagree with the opinions does not alone give rose to a cause of action.
To the PROSPECTIVE client, please call myself or another attorney for your choice with more detaiils and an appointment. My PRELIMINARY answer to your question(s) is for general purposes and based upon what little information you have conveyed. It is based on such limited information that the general answer should never be relied as a reason for your action or inaction. My response does NOT establish an attorney-client relationship and such may only be established by mutual agreement, and the signing of a written retainer agreement, which will generally require payment for our services, as this is what we do for a living and, just like you, we must get paid for our work.. .
In order to even have some possibility of a case, you would need to prove that you suffered some type of injury or hardship due to the conduct of the therapist. As the other attorney stated, she or he will be entitled to their option. Failure to follow protocol for transfer of therapy in absence of injury is not grounds for a lawsuit. If you are unhappy with your therapist, and you feel she has engaged in unethical behavior, you can report her to the state board. They can investigate the matter if they feel it's worth doing so.