Make this better and more scary

The lights turned off. I’m standing alone in the elevator when all of a sudden I feel a tickle across my neck like someone is touching me then I felt something sharp cut my neck. I heard a ding and the elevator lights turn back on. I felt blood dripping down my neck. I look up and see a girl standing in front of me, she was standing there with her hair flipped onto her face, she was wearing a white robe that was so long it wipes the floor when she walks. Then I hear a voice ‘ la, la la, la la” I ran out of the elevator and up the stairs. Each time I run up another level I see her standing there. There are no more stairs, I have reached the roof. I start walking backwards to the edge of the building while she comes closer. ‘come play with me’ I feel her hand push me off the edge. ‘Ahhhhhh’ I woke up with a shock, my heart beating was beating so fast I felt like it was going to explode.