I've been having terrible nightmares for over 3 weeks.

Last night..........

I was run over by a dump truck and in the dream i could hear myself screaming and then all of sudden the dump truck turned into a 4 door car that was dragging me down the road...still screaming.....i then saw a figure of myself running after the car shouting at it to stop.

How do I make these terrible nightmares go away?