It definitely sounds like a delusion, and I hope you feel better soon. ((HUGS)). I know that feeling though where no matter what anyone says to reassure you that there's nothing to worry about, the thoughts are so powerful. I've had delusions of being watched where I thought people at both my old job and current job were watching me and that the FBI was investigating me. There was no basis for these thoughts. I really hope you get the help you need.