Who prescribed it to you? It's probably worth a try. I've been on it before. You never know what type of medication will work for you until you try a few, for at least a few months each.
I hear things in my head like that sometimes too. I have to say "what time is it" instead of "do you have the time," or Green Day will start playing in my head. It's weird but hasn't concerned me much. It seems to just be from having a very active mind, your brain is always trying to relate everything it sees and hears to something else you already know. That's my theory anyway.