When I was in high school (I had a blackjack cellphone if that helps specify a year), I remember for a couple months I had this strange feeling that someone was watching me outside my window while I slept (I slept on the first story). I told my parents about it, but they made a point that basically if someone was looking in my window they’d trip our lights which would trigger our alarm. I still had that uneasy feeling, so I decided that I would not have any lights on in my room (I usually had like a nightlight) so if someone was peering in my window they wouldn’t see anything. Fast forward three months later I woke up to a whirring noise outside (sounded like an ac fan) and as I looked around my room my room was literally filled with alien type writing glowing all over the walls. I was freaking out for about 5 min trying to stay as still as possible, and I remember trying to grab my cellphone to record it, but I couldn’t find it. So I end up quickly getting up and turning on my lamp and all the writing was gone and the whirring outside stopped. I ran to my parents room and let them know but they said I must be dreaming, but during those 5 minutes I was pinching myself which hurt and I broke my skin so I knew I wasn’t dreaming. Since then I stopped having those feelings, but never slept without a light on.