BSOHF

Every time I close my eyes at night I get these really nasty pictures of dead people So I have to open my eyes really fast but when I close them again another one flashes through my mind I don't know what to do even my Dreams are weird. I dream of killing people (its never really me in the dream that's killing.) or im being killed by some psycho killer I feel so weird telling people about them because I don't want them to think in crazy or something...
Also I always see dead people (Im not kidding) I always see people walking across the street and I yell for whoever is driving to stop but there is no one there (that they can see anyways)I always see them around even in my house its starting to freak me out whats wrong with me am I insane? or could it be a sign of something?