Repeating this process and knowing in your heart that you've done all you can to prepare your speech will help build your confidence levels.
You could ask a friend to help you with mastering the pitch before it’s presented, and if you’re not able to find someone to be your practise-audience, try rehearsing your pitch in front of a mirror. Repeating this process and knowing in your heart that you've done all you can to prepare your speech will help build your confidence levels.