Here's a good one for you!
I have a nasty voice pop up in the back of my head at random times. I'll be talking to someone nice and that voice pops up saying something vile. I HATE these thoughts but if they're from me, am I secretly a bad person? How do I make this stop?
That doesn't make you a bad person. It makes you a person that should see a professional, about a problem that you need help solving. I hope you make an appointment, so that you can have peace of mind.