Paranoid or Paranormal

We are all familiar with ghost. The stories we were told as children to either keep us from going into unsafe buildings, or the cartoon Casper the friendly ghost. As we grow older, most of us grow out of those stories and simply accepts them as nothing more but stories. I am not one of those people. I do believe that there is a life after this one, and that not all are willing to rest.

I have had many unusual experiences when it comes to topic. Just last night, while I was in between the the crossroads of sleep and awake, I felt the presence of someone pining me down. For as much as i tried to shout for help, no sound would come out. I then decide to get it off of me the same way I would get someone of flesh of off me, and it worked. However, when I did so, it felt like I was grabbing a pure force of energy, and when I woke up I saw a human figure in the shadows but no one was there.
I cannot say that this is a new experience. Since my late teens, I have had this encounter before, and each one is a frighting experience. So I ask you my anonymous reader, for your opinion. Is this a force full repeating nightmare, paranoia, or is there someone from the grave who has it in for me.
Eager to hear from you.