strange sightings

my mother told me that when I was younger, I'd like look up at ceiling corners, smile and laugh like I was seeing someone in the corner smiling and laughing at me I also have a story in which I have seen a strange white figure by my family car whilst my siblings were talking about sleep paralysis demons sometimes in class I'd have this strange feeling that i'd been in this situation before, or that I'd seen it before not like regular deja Vu, I feel as if I'd clearly seen these events but simply forgotten and sometimes I feel as if I am not alone that something else is with me