Psychotic disorder not otherwise specified (NOS) is a diagnosis often given to individuals who experience psychosis symptoms but who do not match the criteria for other psychotic disorders such as schizophrenia or schizoaffective disorder. It may be possible that you have a type of schizophrenia and were diagnosed incorrectly. If you are unsatisfied with your current doctor you should seek a second or even a third opinion.
The fact that your daughter is hearing voices is a major concern. If you haven’t already done so, have her evaluated by a physician. During the evaluation, be certain to report your symptom history. This information can help the evaluator better understand what may be happening with your daughter.
Seeking out alternative opinions may help. The only way to know for certain would be to try. What I find encouraging is that medication has almost completely eliminated your symptoms. It is important to emphasize this great news.
Be careful not to spend too much of your time and energy searching for the “right” diagnosis. Psychiatric and psychological professionals use the diagnostic and statistical manual (DSM) as a guide for diagnosing mental health disorders but it is not a perfect system. Individuals often report being evaluated by several mental health professionals and each time, receiving a different diagnosis. Each evaluator believes his or her diagnosis to be the most accurate. It is difficult to know which one is the most correct.
Does the cause matter more than the cure? I am not certain. It is a difficult and perhaps impossible question to answer. Legitimate arguments can be made for both sides. In my experience, it seems that finding the best and most effective treatment is much more important and meaningful than finding the “right” diagnosis. I wish you the best. Please take care.