I mean, you can just sleep through the nightmare as I do-
Then again, I will literally even sleep through the most horrifying of nightmares....
I mean, I get nightmares so often, that I just learnt to sleep through them
Tired but my body said no. I woke up at 4AM from a nightmare, and two hours later I still can't go back to sleep, body decided "NOPE, YOU WOKE UP, YOU'RE UP :)"