My Defense Looms

So, I managed to successfully hand in my Ph.D. thesis, despite it almost killing me, and the 3 weeks later the day has almost arrived for my defence. I am absolutely shitting it. On the one hand, it could be fine. The examiners might have really like my thesis, thought it was perfectly complete as is and just end up asking me general discussion questions during the viva. Or, it could be a disaster, where they nitpick at almost everything I have written, don't agree with me, and then put me on the spot and I whither to a sobbing heap. I am sincerely hoping for the former senario. Yet, either way I am still shitting it.