I've been reading these entries for hours before realizing I had a creepy story of my own! I can't remember if I've shared it on reddit before or not, but here goes.
This takes place in the house I lived in from the time I was 3 months old up until I was 15/16. It was a two-bedroom home built in the early 1900's, but my parents had remodeled and made it all nice. I shared a tiny bedroom with my younger sister. I had a tendency in this house to wake up every single night at random, in the middle of the night. I have no idea why. I also always felt like someone was there with me...I'd have to peek out of the shower curtain every so often while I was showering because I felt like I wasn't alone.
I think I was 11 or 12 when this particular incident occurred. I had woken up in the middle of the night as usual, and laid in my top bunk waiting to go back to sleep. I happened to look over towards the closet and saw a figure standing there. I used to describe the figure as a 'monk' because it was tall, thin and seemed to be wearing a dark cloak that covered its whole body. I realize now that I am older that what I saw could've possibly been better described as a shadow figure. It stood about 3 feet away, and raised an arm to point towards the single bedroom window. It repeated this motion a few times, and then fled through the open door into the living room, where my mom was sleeping. I went back to sleep and didn't think much of it.
The next night, the same exact scenario happened. Except this time, the figure ran through the closed bedroom door. I never saw it again other than those two nights in a row.
Other things that used to happen in the house...our computer was in the basement, and the basement door would shut and lock very easily so I often would find myself locked down there accidentally. On one such occasion, I went up the stairs and found the door locked, so I waited patiently on the landing for someone to open the door. As I waited, I heard footsteps approaching from the bottom of the basement stairs. No one was down there but me, and I couldn't see anybody.
Tons of stories from that house.
Before we moved to the house we're in now, we found out from a family acquaintance that his aunt and uncle used to live in our house, and his uncle had died in the living room. Not sure if that's relevant to the figure I had seen, but still an eerie coincidence anyway.
EDIT: It's worth mentioning that since we moved out of that house, I never feel like I'm being watched and I never wake up in the middle of the night anymore. I also never have experienced any unusual occurrences since moving from that other house.