Send her a registered noterized letter requesting any and all documents regarding you taht are in her possession. Send copies of the letter to the district attorney where she lives and where you live.
If she fails to respond, contact the ACLU in your area and show them copies of the letters you sent and ask them to help you in aquiring your own medical records.
If you still can't get copies, ask a medical doctor to make a request.
contact the people at refocus.org and ask them if they have any other suggestions, they might be able to refer you to a therapist who specializes in cultic issues who can make the request directly to Mrs. P and who can contact licensure boards if she fails to provide the records. You can also file a complain with the licensure board for whatever degree/license that she holds- most likely a LCSW or LMFT.
The law is on your side here, though it may be that only another therapist will be sucessful.
Finally, this is really not a 'testimony' and as such would get more traffic and support if you post it in another area.