Think about it all you want. It’s never as bad as you think.
The mind seeks certainty before occurrence. Naturally, we think of negative outcomes first.
Few people are confident in their ability to succeed. These people are either well prepared or simply overconfident, which can be equally as bad as being too pessimistic. Never fabricate your past work nor future effort.
Embrace fear, worry about the future so you’re forced to over-prepare. Preparation makes you quicker on your feet.
As soon as you feel confident enough, let go. You can’t predetermine an outcome. The only thing you can control at that moment is focus and flow. Remain steady throughout.