Sorry but that made me chuckle for some reason.
Like others have said, at least you're getting interviews, sooner or later you're going to deceive someone into believing you're a competent worker. Also, it's not much of a silver lining, but it's all experience, the more interviews you have the less likely you are to get caught off guard in one and the more comfortable you'll become in that situation.
Have you thought about doing something to bulk out your CV while you look for work? Learning to drive for example (I assume you don't because I'm sure you'd rant constantly on here about other motorists if you did) is another feather in your cap and could open up more job opportunities.