distraughting dream

so few days ago i had this dream actually three in a row and the first thing i notice that the landscape of my dream was different from normal the coloring was what one might call drab and slightly gloomy...there i was walking down a foggy street illuminated by street lamps but you couldnt see the actual poles just the illumination..so i am walking and i remember i had a cigarette in my mouth and then i feel a dull pain in my neck and realize that i have been shot once in the neck area right next to my throat i recall the feeling of it striking me...so i am laying down bleeding and what not..i wasnt screaming or anything but then i remember opening a door and seeing one of my very good lady friends laying down next to her new boyfriend at the time and im asking her to help me but she doesnt notice me....then the dream breaks into another one...i am on a hill like terrain it is still gloomy and drab i see sown this hill my roommate joe is being put into a body bag by some men i try to yell and what not such as "what are doing with joe" then i realize there has been no sound in the dream so far...i run down the hill and as i rip open the body bag its empty no one is in it....then it breaks in the third and final dream i am standing in airport holding my friends ex girlfriend at first the feeling is comforting and relaxing then i feel immense guilt i always am looking at the revolving doors searching for my friend to come in but he doesnt but i still feel guilt and revulsion..then i awoke....so any ideas what this could mean it not the way i dream everything was different about it....so yes i need your help