hi, i am new around here and my question probably does not have anything to do with LDs but its been bothering me alot.

Theres been couple of times that ive been experiencing some sort of Dream or Nightmare someone told me is me being paralyzed in my dream. When i fall asleep i wake up and i see my room, im still in my bed facing up, my body cant move but im able to see my room dark and its some kind of scary dream, i want to move but i cant and i say to myself "move!" but its always hopeless, and sometimes i feel some sort of presence. what the heck is this? is there a meaning to this or a sort of explination?