When I have nightmares like that, it's because of the stories I might have told or listened to during the day. Or, it has to do with something I saw or watched. But don't worry, it wont happen.. If u wake up and u don't like it, say a prayer and hush yourself to sleep...lol
I have the same nightmares! Have had them for 20 years, ever since my Sis disappeared & was found murdered! I even saw my body on the floor of my bedroom one time! Scared me to death but I'm still here!