Happiness Vs. Sadness

You know that one day (or week, or month, or whatever period of time) that you keep thinking something, and you know it’s bad/wrong/horrible/degrading and everyone would hate you if they could read minds? You know those days when you pretty much hate yourself for that one thing that keeps running through your mind, but no matter what, it will not leave? You know those times when you’ve tried so hard to stop, but it just keeps coming?
Make it stop. Please. I am not this person.