Yeah and may I suggest just changing the environment when you get them. As unhappyguy suggested it is a sign of mental health to be able to step back. When I get nightmares, I turn on all the lights,make sure to get something to eat, maybe watch tv for a bit. Maybe it's childish but it feels empowering to say, yes, I CHOOSE to keep the lights on. Maybe you can do something nice for yourself when you get these thoughts, just to remind yourself.. these darn thoughts are getting in the way, but they are not the boss of me.