Do you ever just sit alone in your room and hear a noise that your mind turns into voices having a conversation about you? 

I have this happen occasionally when I'm really stressed I trick myself into believing their real for a short bit before realizing the absurdity of it. 
I'm wearing headphones (off) the walls are concrete ect.
I used to have it really bad when I was young. I used drugs which heightened it to a certain degree. I'm just dreading the day where I delude myself to the point that I can no longer tell fact from reality.