If I were that paranoid, I wouldn't say it on an internet forum, in case someone read it, and got me committed.
(Am I being serious, only I know!)
I did grow up in a country where bombs went off, and when I see something on the floor, I tend to wonder still if it could be an explosive device. Hence, if I saw a wallet on the floor I'd think twice about picking it up. I think that's a learned fear, and given my background, understandable, if not sensible.
In the office where I work, I'm often convinced that people are talking about me behind my back, and there are a few people who smile at me when they see me, who I know can't stand me. That makes me somewhat stressed. I can't understand why you'd smile at someone's face, then tell lies about them behind their back. Do they not realise that the gossip gets back to me?
Obviously, these aren't very bright women, but the thing is, most people aren't very bright, so I assume this is "normal" human behaviour. I don't like it!