Yes, professionals are human and prone to error, thus I agree with Anthony's suggestion to seek out a second opinion, especially if one has doubts. I often suggested such to my clients. However, I do also agree with Anthony that untreated PTSD encompasses aspects and symptoms of many disorders. My daughter with PTSD also displayed many aspects of a personality disorder when she was very ill, some aspects of schizophrenia as well, however she has neither disorder. Since being in treatment for PTSD, she no longer displays these symptoms.