MY SON ISshowing Signs Of Extreme Anxiety. He Enjoy Rap

MY SON ISshowing signs of extreme anxiety. He enjoy rap music and he firmly believe that luminaty exist and this people are there to hurt him and his family. his fears are getting so bad that he feels he has to protect us from any harm.He has been taking to the mental behavior unit and he has been diagnose with bipolar disorder but I think he has Generalized anxiety disorder.I feel that he is given the wrong meds. what can I do for him?