Take your time, if you can, to finish a good thesis. Make it the best presentation of your research, to convince your examiners of the significance of your work and your talent as a researcher.
Take your time, unless your time is very limited, when you need to prepare for the viva. Spread out the work. Sketch out a plan for what that period might be like. Think about how you can break up the things you need to do so you’re not overwhelmed.
Take your time, and there’s plenty of it, to pause and think and respond well in the viva. You’re under no rush. You might feel a pressure to do well, but that shouldn’t come from a need to go quickly.
Your PhD is worth doing well, so take your time.