You could feel happy at your viva because of the opportunity to talk with two experienced academics about your work. You could feel happy that your PhD journey is almost finished. You could feel happy that your hard work has paid off!
You could feel happy for many reasons at your viva – and I hope you do. If that’s not the first feeling that comes to you then do what you can to navigate your way to finding some positive thoughts. Find a little ray of happiness, anything you can, for meeting your examiners and heading towards the conclusion of your doctoral journey.
Whatever you feel, work towards feeling ready. Work towards feeling as good as you can for the work still to do.