Mental illness is just a big ball of mush, and they try clumping it together to see what sticks. Any one condition of any type of mental illness can and often are mistaken for another like bipolar and borderline personality disorder are often mixed along with skitzpphrenia.

People with DID are usually diagnosed a few of these before the final diagnosis of which some have taken tens of years to receive.

Also, mental illnesses can run co-morbib like I'm DD and bipolar while Others are borderline or some other personality defeicency.

Have you taken anti-pychotics? Seroquel I know helps skitzos with hearing voices.