Something here is not right.  Violating HIPPA requires that there be some type of transmittal of your health information that is protected under the law without a valid release.  The law applies to "covered agencies."  I believe that there was some violation her and that the hospital misused their authority to request information of the pharmacy who should have checked on this before giving the information over.  I think that you need to seek help from an attorney and discuss not only the HIPPA Violation and filing a complaint but a violation of your right to privacy and a breach of duty cause of action as well as a violation of employment rights.  Good luck.