HH
Hypnagogic or Hypnopompic Hallucinations
This is closely related to Sleep Paralysis. When a person wakes up with Sleep Paralysis, it is sometimes accompanied by Hypnopompic Hallucinations. An example hallucination would be sensing an "presence" in the room. It is not an uncommon thing, with 30 to 40 percent of all people experiencing it in their lives.

I have some questions about what HH is.

First, is 'Sleep Paralysis' when you are paralyzed inside a dream? or just after waking?

I've had multiple occasions where i wake up, not able to move, and i think somebody is in my room. I think that is the 'presence in the room' thing. And im not able to move until im calmed down enough, and i've waited a period of time, to assure myself that if there was somebody in my room, they would've made a noise or moved by now, and that nobody is in my room. After that i can roll over and continue sleeping.