The Biggest What If
What if it happened at my viva?
Whatever it is, there would be consequences. That’s a simplified way to look at the situation, but it’s the most accurate. The most dire “what if” differs for everyone; depending on the exact details the consequences could vary a lot.
It might be forgetting something. In which case you could take time to recall. You could annotate your thesis to help you remember. There’s something to do.
It might be worrying about saying “I don’t know” – which is a common viva worry. Saying “I don’t know” is not the end of the viva. Rehearsal before the viva helps a lot. Remembering you can pause in the viva to think about why you don’t know.
It might be anxiety about failing. Failure at the viva is rare. This might be the biggest what if: which means that if you worry about it then you have to do something to move on.
If you’re really worried that you might fail then you need to explore why. You need to talk to your supervisors or someone you trust. You need to figure out what’s at the root of the worry. You need to do something.
It doesn’t just happen. You don’t just think about it for no reason. If you can figure out what’s causing you to wonder “what if…?” you can then take steps to move past it.