My mind keeps repeating certain words or phrases over and over again, involuntary, like it's on autopilot. These are not compulsions since I don't repeat them myself to calm down, on the contrary, they seem intrusive and are making me very anxious, and keep going on this endless loop. For example: "red car, red car, etc"( this is only an example). Sort of like when a song gets stuck in your head, but instead of a song, just words/phrases. Please, anyone has any idea? Is this OCD related? Did anyone experience something like this? or at least something similar?