Awake hallucination or lucid nightmare?

I was exhausted, my mental health hasn't been good. I tried to take a nap. My partner was next to me. 
I have this problem where I can go into a dream in an instance, but I'm not really asleep, they'll last minutes, if not seconds and they feel real. I confuse my boyfriend by asking about the 'conversation' we just had.

I finally got to sleep (?) But my 'reality' was my boyfriend had gone to the loo seconds before, but then I was 'awoken' by him getting up to use the loo. 
(He's clarified he didn't go twice, or tell me he was going. I'm still in shock so I haven't told him what went on. Probably thinks I'm nuts).
This is where I went into what I believe to be a lucid nightmare. I realised seconds in. There was a demon taunting me, holding me hostage from getting help, therefore being stopped from leaving my room in the 'dream'. I was crying, begging the demon to let me wake up. I could not wake up. I thought I was going to be stuck there, I felt like I couldn't breathe. I felt my connection/cord/tether? To the real world had been torn. I conned the demon into letting me out of my room, I bolted downstairs, tried to get attention from my mum and her partner, but they couldn't see me, I was walking and talking like I was drunk and in parts I was paralysed still and couldn't talk (like I was dreaming sleep paralysis) and in others I could scream but could not be heard. Anyway the demon caught on and I laid down on the sofa accepting my fate, genuinely fearing for my life. I think I thought I would be killed in both worlds.
Then my boyfriend comes back in, some while later and it woke me straight up.

I've never had an experience so severe.
I've had sleep issues but minor, common ones. And I've hallucinated several times but it's not a common thing and never scary just takes me off guard.