According to my years of nightmare experience, the most commonly used method is-1. Calm down first (because I have hallucinations when I have nightmares, so I can skip it if not. ) 2. Take a deep breath. Feeling? Until the lungs swell up and you can't breathe in again, which is the most important thing), about three or five times, each time? Feeling? Until the lungs swell. Then it is best to sit up after waking up and wait for three to five minutes before going to sleep (I wait until I feel awake before I get sleepy). If I don't wake up and go back to sleep, I will enter this state again. You'd better change my sleeping position (don't put your hands on your chest).
And I usually have nightmares when I take a nap. I don't even take a nap now. It is said that it is related to physical fitness, and it is too slow to make up the body.
If it really doesn't work, you set an alarm clock regularly. . . If you can't adjust yourself, you have to pass through foreign objects.
I hope I can help you and understand your pain.