Borderline personality disorder involves intense and unhealthy interpersonal relationships, an unhealthy and broken self image to point of one not even identifying with ones own identity, a distorted view of self, and sometimes paranoia as well. There are more symptoms, however this is the gist of BPD. If you are displaying symptoms of auditory hallucinations, then you do have to get checked for some form of psychosis. Get a Rorsharch and MMPI assessment done with a clinical psychologist followed up by a psychiatric evaluation and a neuropsychological evaluation as well. The tests will give you a clear indication of what exactly you are suffering from and what treatment options are there. Do not worry, as the symptoms are very much manageable with proper treatment and therapy.