There's been a problem from a long time now...like I often see nightmares and in fact a lot of them and wake up screening from sleep...I always feel like someone is watching me or is behind me and someone is singing or saying something specially when am alone. It also feels like someone is standing in the dark....I am 18 year old now, high school athlete. I love basketball and boxing and everything else and am fit and fine with no physical problem...is there a way to get rid of these symptoms or what ever I've got???