"You seem to replace your brain with your heart"
It's a line from the song "Cry Baby" (Melanie Martinez) I kinda feel that way. I'll explain. When people say "listen to your heart" they often say about love when your heart tries to say your brain that you love person, but brain repulses it. But with OCD your heart tells that you DON'T, but thoughts in your head ("brain") keep telling you that you are. Like your brain replaced with a heart.