There is no potential HIPAA violation if noone but you actually saw the records you took out of the office. (Not saying this is a good idea, just not necessarily a violation.)
I've edited the tags above so an employment lawyer in your area might see the question and be able to help you. Good luck.
This response is intended to provide general information, but not legal advice. The response may be different if there are other or different facts than those included in the original question. See MKnutsonLaw.com for more information on why this communication is not privileged or create an attorney-client relationship.
You may want to repost this under "employment law" with your location. Or, you can do an AVVO search for employment law. View the profiles of attorneys from the search, call one you like, and see if there is some cause of action. At least, recovery of your pay would be a next step.
We do not have a client/attorney relationship until you make an appointment, we discuss your case face to face, I accept a retainer, and we explictly agree to enter into representation.