Paranoia is the feeling that you’re being threatened in some way, such as people watching you or acting against you, even though there’s no proof that it’s true. It happens to a lot of people at some point. Even when you know that your concerns aren’t based in reality, they can be troubling if they happen too often.
Clinical paranoia is more severe. It’s a rare mental health condition in which you believe that others are unfair, lying, or actively trying to harm you when there’s no proof. You don’t think you’re paranoid at all because you feel sure it’s true. As the old saying goes, “It isn’t paranoia if they’re really out to get you.”
paranoia
https://www.webmd.com/mental-health/why-paranoid#1