When I wake

Woken up to the smell of a hospital room, 17 year old Amber smith is startled to see her thighs and forearms covered in cuts. She doesn't remember anything that has to do with it- she doesn't even remember who her real family is. Amber decides all she needs is sleep, but when she wakes up again, she has more wounds covering her body. This time she remembered something familiar happening in her dream. Basically stuck in a nightmare the only options for Amber to wake up is either to die, or escape her horrifying killer within her slumber. How can Amber escape?