My T tells me, that when the thoughts come, you have to think of them as "those irrational thoughts". Because they only have power if you give them power. And think about how much worse they get when you entertain them. But then, think about how much power they lose when you tell someone.
I'm sorry that you're going through this, mija. I know what that's like far too well. But never forget, that you're not alone in this!