This happened to me about two months ago (I think).

So it's a school night and I'm in bed trying to sleep (I usually try to sleep around 11:30-12). My bed I positioned in the corner of my weirdly shaped room, and the top and one side of it are right against the wall. So there I am sleeping, with my back against the wall like I sleep every night. While I'm finally drifting off (in that state where you're sort of asleep but you sort of know what going on around you), I randomly hear this weird raspy whisper thing. At first it sounded like my friend but the more I thought about it, it sounded really weird, unlike anyone else. I decide that it's me imagination and go back to sleep.

Two to three nights later, I'm sleeping in the same position in the same direction, and I hear the same sound, while I'm in the state where I'm sleeping but know what's going on around me (again). I think it's weird that it happened again, but again I just go back to sleep thinking it's nothing.

Finally, about two to three nights later again, I'm sleeping in the same position with my back against the wall, and while I'm in the state where you're sleeping but know what's going on around you, I feel two taps on my shoulder. I remember exactly how it felt and exactly the time between the two taps (it's like double tapping the home button on an iPhone). My back is facing the wall and no human could fit behind the wall and my back. This time I just dip. I run to my grandpa's room with my pillow and sleep beside him. Then, five minutes later, I hear the door alarm go off once. I get really scared and contemplate going to check it out, and as no one else is awake to do it, I do. I check the front door and nothing is there, but I'm too lazy/scared to check the door that leads to the garage. I then go back to sleep (I should add that it was a VERY windy night, the types where you hear the wind howling) deciding that the strong wind was the reason the alarm went off.

Nothing has happened to me since then.