wewe must pray to God to help wewe 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 wewe lie down, wewe will not be afraid; when wewe lie down, your sleep will be sweet." (Proverbs 3:24)
depends if God au the devil au 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 wewe can't help what wewe 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 wewe think it doesn't really mean anything, don't mind it.
If wewe do bad things leading to the nightmare well, yes. But if wewe do nothing and have a bad dream, it's kinda a temptation from the devil. Thanks for reading.