Please Read: What is really going on here? Am I crazy?

sounds to me like an intelligent haunting has attached itself to you. If it makes you feel better a girl i dated had close to the same thing. It started when she was 6 now she is 17 and she has learned to live with it. Many spirits come to her some to mess with her others to communicate. Maybe this is a step towards communicating with this spirit. Once when it is quite, try talking to it and communicating with it. Try to get answers all i can say is be careful because anything can happen because what you said can also be a demonic haunting that attached itself to you. If you start getting scratched and having physical damage to your body than I am sorry there is not much you can do except an exorcism.