I kinda know what you mean. Thing is I have both. lots of voices constantly IN my head, and then Him OUTSIDE of it. Like He is actually real and I can see Him and hear Him and hold full conversations with Him. Along with that I regularly get to hear the thoughts of others near or around me.
I can understand your situation with sarah. I struggled through my life/work for years and years with Him constantly running my life for me - on a day to day basis. He controlled most things, most decisions, but it was mainly okay. I got into some serious trouble once or twice because of Him, but thats life I guess. To me it was just like going along with a friend. So He kept me away from the doctors all the time.
Personally I have found thats of the three types of voices, its the ones OUTSIDE that cause most of the problems and make life very difficult to live. So I see and hear Him outside of my head and He screams shouts makes me do messed up stuff, thats bad. I hear other peoples thoughts, usually about me, thats bad. And then I sometimes have this constant chatter in my head, like a few nagging people, just holding a conversation just behind me and making silly remarks and laughing etc but not really affecting me like the others.
and most if not all of us look normal