I had a bad dream the other night... need help figuring it out?

The other night I woke up panicked and in a cold sweat. I cant figure out what it means. I do not remember how it started, or how it ended for that fact. I was alone, and some guy with shaggy brown hair I have never seen before was attacking me. It was a kill or be killed situation, and even though I am not a violent person, I am not about to be killed. So I was trying to kill him. I was very gory and bloody, but this guy would not die, and every attempt I made (slashing his throat even) he laughed and was only hurting me more. It was like the harder I fought for my life, the worse he made it for me. He only grew stronger it seemed. What does that mean?