My Bipolar husband admitted himself to a hosp.. and no one will tell me anything.. Is there anything i can do..

Your husband should sign a HIPAA release form at the hospital.  Get the social worker or patient advocate involved to have this form brought to him so that you can get information about his care and treatment, and have a better idea what to do.  You don't have to worry about custody now, unless you are planning to file for divorce.