You are frightened by this dream. If this means anything, it is that you may have received any threats recently. Subconsciously.
What may happen around you recently makes your mood a little unstable. The mental stress becomes greater.
And these pressures may also be related to your family or your mother.
Think about it. Has anything happened recently that makes you feel insecure? If not, it's just a simple dream. Maybe you are influenced by the plot of the movie.