I had a very vivid dream of dieing?

i had a dream that i was liveing in a trailar park with my 2 sons. i dont know where my husband was, it seems like we werent together anymore...and this girl i knew a long time ago and didnt like very much and 2 guys i knew from school cam to my house.....one of the they came in my front door and one guy asked where my kids were...i tol dhim they was in their room playing...and he went to the room....the girl asked if i couold get ahold of my husband..so i said sure and turned around to call him.....i had this very eeerie feeling in the dreama nd something told me turn around.....when i turned around they were all three standing there....an di had a gun in my face.....the girl was holding it and she smiled and pulled the trigger....i remember feeling like someone had just hit me in the head hard......i put my finger on my forehead and felt the hole and i could feel warm liquid running down my face....and everything went black and i feel to the ground....and woke up...what does this mean can anyone tell me?