I had a problem kinda similar but different. iIt was me becoming so fed up with thinking about the same thing repeatedly or it was one word. I was for a long time telling my brain out loud to shut up and leave me alone and had a fear my brain would take over me as its own being and i would be under its control like a puppet. Quitiepine has helped me , It has completely slowed down and blocked out this racing mind of mine. Your thing is quite different though but i thought i could kinda relate , Dont go asking for Quitiepine lol as it wont help you with your thing.