I used to try to not talk out loud to myself , it feels abnormal . I feel it's a thinking out loud sort of thing , otherwise the thought gets lost . It can be a post it note . Holding a conversation with my self and talking out loud to no one is so common I rarely notice anymore. Now that people have those BUG phones , no one should notice me talking out at all. I do tell myself I'm stupid and such at times, but just relate what you say as a possible voice of what you feel inside that needs to be addressed.

Good question by the way .