This sounds more like dissociative identity disorder....yes with schizophrenia you hear voices but they don't take over and there is not normally missing time/memory loss unless you are taking benzos using alcohol or doing other things that can cause black outs. People with DID also hear voices but their voices can take over...DID used to be called multiple personality disorder and is often confused with schizophrenia. Keep in mind this is in no way a diagnosis just something to consider only a pdoc can diagnose someone and if often takes several sessions.