Bill,
I agree with ClinicallyCares. If there is a way you can talk to your therapist and find out why she did it then you have more an opportunity to make the best choices. Feeling betrayed, angry, etc...is completely normal.

Once you have access the situation and talk to her you can decide what to do next including: a formal complaint to the licensing board, many sites ask you to rate your experience with a doctor/therapist and you can certainly let other people know. You can even formal a complaint with your insurance company and let them know of her break in ethics. Often times they file these and if they get other complaints will take action on your behalf.

Please keep us informed and let us know how it turns out.