This fanfic freaked me out and I need to get it out of my head....?

Ok well, I was browsing Twilight fanfiction last night and I somehow came across this story and the author had made Edward this sick, evil, sadistic guy. Now, the authors purpose was basically a challenge with a friend to see who could make their story the most gruesome but this was like, Saw gruesome, or worse. I'm ok with some horror movies but like.....although everytime Edward haunted her in her dream I was like cringing, I kept reading, mainly because I wanted to see if it was resolved. And now its like, I still see Edward as the same character I saw him before, caring, charming, slightly creepy at times with good intentions (lol) but its like, then I see this other character in him, the character from the fanfic, and I can seperate him from it now slightly, like I see a completely different person but It just had me so scared, it was sick. I woke up in the morning and I was really tired but I still felt like, scared and like I was going to be sick. I don't know why I kept reading. Will this fear and thoughts of the story go away?