Is it normal to have a reoccuring dream?

I've been having this dream since i was young, its starts off with me walking through heavy fog, and then shapes begin to become visible. As i walk closer i realize that they are dead bodies piled ontop of each other. All bloody and messed up. It looks like the carnage of a war, then just as i'm about to see something bigger in the fog, a horn sounds, like that of a ship and i wake up. It happens at least once or twice a week. Normal?