This happened to me about three weeks ago and I'm still genuinely disturbed by it. I went to bed around 11pm, nothing unusual. Woke up at approximately 3:47am (I checked the clock) completely unable to move. Not even my eyes would move properly - vision was kind of tunnelling and weird.
There was definitely a figure standing at the foot of my bed. Tall, slim, wearing what looked like a dark robe or cloak. I couldn't see a face but I could feel it watching me. The air in the room felt heavy, cold - my breath was visible which is weird because my heating was on.
After what felt like ages (probably 30 seconds?) I managed to move my left hand and the figure just... dissolved. Like it was never there. I turned on every light in the flat immediately and spent the rest of the night awake.
I know sleep paralysis is a thing and I'm trying to be rational about this, but I've never experienced it before and the details feel too real for a hallucination. Has anyone got experience differentiating between sleep paralysis and an actual encounter?