It's not an "old house", it isn't build over a cemetery... Neither was it a mental clinic before! I've been living in my house all my life... It all began one night, I felt asleep (let's explain how my room is: my bed is at one side foots to the door and one complete side is along the wall so that if you are laying, you have the wall on your left side and the door on your right side at your near your feet).
I suddenly woke up and turned my head away from the wall and saw "someone" entering to my room. The first thing I thought was "it's my dad" but no... This "thing" walked towards a side of my bed, squalled and stayed like that, just looking at me, I tried to turn to watch him better, but I couldn't and just heard him laughing, not an evil laugh, it was more like a silly or humorous laugh, after a few moments he just walked away from my room.
That repeated some more nights, until one night when I woke up, I saw him at my door, pointing at someone, or something outside and shouting at me "he's there, he's there" a moment later, I could feel something holding my neck so I couldn't breath, I was just lying on my back, feeling how I was sinking in my bed until I saw him trying to release me from that thing that was holding my neck.
I've never seen completely well that "thing, shadow, person, phantom" or whatever it is, but I can "sense" it's a man, but what is he doing in my house, why after all this years, why he suddenly appears and first laugh at me and then saves me from other "something"?