I Saw a Woman with Straight Black Hair and a White Dress

On 3/17/16, while I was reading about Bloody Mary on the internet I heard a strange sound, like a sort of scraping.

I got quite scared. I went to go check it out. When I opened the door I saw a tall woman with straight black hair and a white dress. She ran toward me. I quickly closed the door. Once I calmed down a little I opened the door and the woman was gone!