Horror, why

Date: 10/3/2016

A bit of a reoccuring dream where I'm walking through a basement of sorts. I've been down here before, and to my left is a long hallway that leads to another cavelike entrance. This entrance has spooked me before, but there has never been anything there. Tonight there was. Just a blacked out figure of a woman. Everything in me tells me to ignore her and keep walking, but instead I yell something at her and she starts walking towards me. I turn and run to the door of the basement, and she starts running too. She's always just a black shadow, even in the light. And she's gaining on me. I wake up.