You need to listen. Avoid letting it turn into a waking nightmare too. Recurring nightmares generally mean you haven't assimilated the message or lesson your dreaming self is delivering to you. They usually aren't exact duplicates of previous nightmares, but have similar themes or characters. They change in content as the waking situations related to them change.
Nightmares involving fighting another can have many meanings.
You could have symbolically divided yourself into parts which then fight it out. Or when someone attacks you with words or thoughts in waking life, you might translate this into a dream where you are being shot at with a gun. If your feelings are really hurt, in the dream the bullets might hit your body. If your feelings are unhurt in the dream, the bullets probably missed you. Fighting generally symbolizes conflict.