Negativelady you have to calm down! You're right that this is paranoia, people (with solid experience) are expressing confidence in your abilities and you should take the compliments as they're intended. The viva scares the crap out of everyone and it's natural for you to be worried, but your feelings are just that, worries. They aren't insights of great clarity and they aren't omens.
Take a deep breath and try to believe in yourself :-)