I thought my husband put cameras in my house and got internet strangers to repeat something me and him talked about to subtly let me know he's always watching or has watchers. I questioned myself a lot during it though wondering if I was being paranoid but it did enough damage to affect how I conducted myself in certain situations. Not sure how long this lasted but it was very unnerving. I also had a time when I thought my neighbours were watching me out their windows and peeking into my windows. I go threw the supernatural bit too here and there. Some days I'm psychic other days I got nothing lol.