Horror stories to give you nightmares

The car

One night while I was driving home from work, I noticed that there was a car following me while blinking its headlights. I tried to ignore it, and keep driving, but it kept following me for about ten minutes. At this point I was getting really scared and I decided to all the police, because the car wouldn't stop following me with its bright headlights. Eventually I got home, and the car stopped on my drive way behind me.
Right on time, the police got there and took the man out of his car.
The man struggled and told me something as the police were arresting him.
"I was trying to warn you!! There is a man in your car!" He said.
The police rushed over to my car and looked in the back seat.
There was a blood stained knife with a note beside it that said,
"I'll kill you tomorrow."