Growing up in a family a 5 psychiatrists one who works for NIH I think it is definitely time to see someone. Hearing voices can be a major psychological problem in itself but when the voice is telling you to do things that is when it is imperative that you seek the help of a professional. Without help this can become a worse problem effecting all aspects of your life as it becomes worse, and if it indeed turns out to be a mental problem it is one that can be treated through medication and therapy much more effectively when evaluated and diagnosed by a professional much more effectively. If you need someone to talk to let me know.