You are terrorized by something or someone. Your mind is not at peace as something is haunting you. To see such dreams means that you have been scared of someone or something for a long time now. The fact that you saw a girl in the mirror also suggest that there are some ghosts of the past that you need to deal with. The dream is asking you to take a stand against the problems that you are facing because being scared is not the solution to your problem. So, you should try to look fear right in the eye as it may melt away then and there.
Interpret this Dream
with what you may find.