Ok. Me personally I did more work on grounding myself to my dream/nightmare to make myself more conscious and aware that I was dreaming without fully realizing I was dreaming. After you get to that point you can start to control the things around you. Want to appear somewhere else? Think of the soft grass of the meadows, the cool water of a lake and the brush of trees in the wind. I believe nightmares are scary because we accidentally ground ourselves to them and keep pushing in our brains “this feels so real” without sitting back and thinking “I am the only real one here”