There's Always A First Time

Last night in my dream.... I had a visitor.

No, it wasn't a person from my past, or from the present.
It wasn't a celebrity cameo though that humorously does tend to happen in my dreams.
And it wasn't 'myself' from the outside. (Or was it...?)

My visitor came as a demonic creature....it didn't have any shape whatsoever but had a particular sound. Raspy scary sounding whispers like in a horror film (not the most original, I know) and the notion that it was dark, shadowy energy approaching me from my back, and getting a hold of me.
It was very much like a vivid dream, so I was aware that I was dreaming, but it all felt incredibly real.
When the creature - or whatever that demonic energy was - got a hold of me ,it took over my body and I wasn't able to move or utter a sound.
When I finally woke up - as I was eager to wake from this nightmarish encounter - I felt like I was breathing again after being choked.

I laid awake in my dark bedroom, immediately making a sound as if to confirm that I was able to.
A moan, a shriek, a heavy sigh. Any sound that could relieve my fears without waking my boyfriend up. 
I looked at the wall across from me, trying to hold on to reality, but the wall was rather frightening as well: The plant in the corner of the room seemed much bigger - granted it was dark, but it was as if it had additional leaves than the usual 4 giant leaves it has. And the eerie feeling I had in the dream followed me here in a way I couldn't explain.
It was 3:23 am. I know because I peaked at my phone on my bedside table. (Bad habit, I know)
I stayed awake for a few more minutes, dreading going back to sleep as the encounter was so freighting, but exhausted and undoubtedly sleepy... I fell back asleep.

Fortunately, I didn't encounter that demon again and when I woke up, knowing it was all a dream, I had the eerie feeling that this dream was.... different than other dreams I've had. As a lover of dream analysis that I am... I turned to my good ole' buddy Google to ponder on what that dream was all about.
And lo and behold...I realized it wasn't a demon I encountered.
In fact, it wasn't even a dream. Well, sort if....:
It was SLEEP PARALYSIS that I experienced. 

I have just completed a two hour research (I mean can we call google searches 'research'!?) obsession on this unusual state, and the Wiki page here and other sources online confirmed my realization.

Being it my first time (and I hope my last as I wouldn't call it pleasant in any way) I feel devirginized and like I'm about to face the world in a  whole new way:
As a person who experienced Sleep Paralysis, and lived to tell it. 

Have you ever experienced this strange phenomena?? What was your experience like?