Ok, so let me begin by saying I've never been normal with anything but now as time goes by i begin scarying myself more and more with things i find myself able to do but since they are off topic for this im not gunna list them and junk so yeah..... and these 2 things really freaked me out about this one dream I can't understand. well for a while now I've been seeing this figure around me but whenever i try to focus on it, it would disappear at first I thought it to be a shadow or something but after some time my opinion changed because it didn't appear human or anything all i was able to see are a basic shape and it's colors black, gray, and some white before it would disappear and in my dream It started off as a memory with friends at the beach then i heard something like "now" in a slithery voice and suddenly I was in a graveyard type place in the middle of the night and fog was on the ground or morning dew whatever it's called and it seemed to be in a forest and I found myself walking/following a voice which was speaking but wasn't more of just humming noises and hissing sounds and so i start running after it then it goes to a blank spot with no headstones, nothing, and the figure whom i still can't really see walks up and starts choking me and in real life even i feel the pain and have trouble breathing and i was barely able to wake up like something wouldnn't let me open my eyes and wake up and the thing wouldn't stop it's "talking" and when i woke up i felt sick to my stomach, dizzy, and had trouble focusing on my room around me for atleast an hour and it was almost impossible to fall back asleep.... place help me figure this out... please

on another note i haven't had any sort of nightmare since i was like 5... that was 9 years ago...

The shadowy figure, the strange hissing noises and the feeling of being choked sound like the sensations people sometimes get during sleep paralysis.