It may be the things toi ate ou the activities toi did. Stop eating camelote, indésirable food, specifically late at night. camelote, indésirable nourriture and unhealthy nourriture cause toi to dream, with mostly bad dreams. Also, try not to exercise hard at night, because heavy activity can also lead to bad dreams. Don't watch scary films either, because dreams are your subconscious producing images, and whatever toi think about, will cause toi to dream about those particular thoughts.