Did you leave work yesterday and have a stab of fear that you'd forgotten to press save before switching off your computer? Did you then go to the pub, get very drunk, then wake this morning unable to remember what awful things you might have said or done?
You're not paranoid (most of the time) but suffering from modern phobias. Such as Antefamaphobia — the fear that people were talking about you, but stopped just before you entered the room. Or Agmenophobia — the fear that the queue you join will end up being slower than the other one.
The Book of Phobias will confirm every sneaking suspicion you have of a suffering from a weird and wonderful phobia, and highlight some you never knew you had!