I've had OCD, it would come and go for years, since I was very little. I would get really, really twisted thoughts. And the more guilty I felt, my mind was pushing it even further. When I realized I'm not bad or sick for having these thoughts, and it was actually OCD, I felt relieved and started "playing" with them. The key is to stop being afraid of them. What helped me was not only to let them be and follow them, but also think about them on purpose. Like making fun of them. They fled.