u must pray to God to help u have good dreams and a peaceful sleep. Remember, He made you, and He is the only one who can actually control your dreams. So ask Him, and He will surely help you.
"when u lie down, u will not be afraid; when u lie down, your sleep will be sweet." (Proverbs 3:24)
depends if God of the devil of anything relating to soemthing important in the bible then it's a sign but if it's just a bad dream then it's normal u can't help what u dream
Everything but your nervous, respiratory, and circulatory system sleeps at night. I've heard that there's someone called a "brain guard" and at nightime he falls asleep, so all the things in your brain get mixed up and become dreams. I don't really believe it. Sometimes God can send a warning. But if u think it doesn't really mean anything, don't mind it.
If u do bad things leading to the nightmare well, yes. But if u do nothing and have a bad dream, it's kinda a temptation from the devil. Thanks for reading.