I blamed it on tiredness, on forgetfulness, convincing myself that I simply didn’t remember.

A few times, I even woke up in the night with the clear sensation that someone was watching me. But I didn’t open my eyes — I told myself it was just a dream, just my imagination. Until the fear became too real.

One morning I woke up trembling and realized: I couldn’t go on like this. I installed a camera in my room. I pointed it at the bed and left it recording all night. I was certain that if someone really was in the house, the camera would show it.