A potent strain of viva-anxiety virus breeds in the mind and says:
Faster, faster, faster!
Question. Answer. Question. Answer! Quest-ANSWER!
What if you take too long? What if it doesn’t come quickly enough? You “should” know it, right? RIGHT?!
Your research didn’t come that quickly. Recovering a memory or a fact might be quick. Analysing and thinking might not be.
There’s time available in the viva, and you can use it well. You can do this because you have experience, knowledge and skills, developed over time. Not thrown together ASAP, but brought forth through patient, deliberate effort.
Don’t listen to the virus if it crowds your thoughts. Pay attention to your experience. Take a little time to think before you answer.