Dreams Im not srue are dreams hoping someone can answer

I have had ths happen a few times now, The last couple have been much more intense.
I'll make this short, i will use the last time this happend as there close to the same ,I go to sleep, Or sometime and trying to fall asleep, And i hear a strange buzzing or sometime humming sound, that starts far away and get very loud and i can cal tell as it gets closer, I dont remember everything but sometime i remember a few weird things sometime its just real stuff and sometime its real feeling stuff thathas other thigns mixed in, The last one i had the buzzing noise , Btu in this dream i was outside for some reason i looked up and saw a falling star, Then i hear the buzzing really loud, and see a ball of light moving twords me as it gets real close i see a strange man not a short grey looking thing that i awlays hear about, But a taller man thats very white and has a strange face i cant really make out, well its almost like the ball of light in a way turns into this guy and hes holding something with this light on it like a " i hate to use this word" But , Some kind of wand type thing, An as he gets in front of me i can not move at all at this point i realize that im awake, and its like hes waving this thing over me looking for something? as if i went trough a metal detector and it went off? The whole time i can not move at all i can not speak, And the the light goes away i hear the buzz sound go into the distance and after a few seconds i can move, I know im awake because i get out of bed and am up for the day. This type of thing with almost the same events have happend about 4 or 5 times now within the last year.. has anyone ever had anything like this? The feeling are so powerful and strange and real, I just cant forget it.

thanks..