Accept yourself rather then trying to positively talk yourself out of your fears. It works better in competitions.
A Powerful Sport Psychology Strategy is Self-Acceptance.
You overcome your stuff by accepting and bypassing it by concentrating on the job on hand focus on physical experiences rather than mental occupation.
Tremendous relief comes from self-acceptance, because you do not having to pretend, cover up, or suppress your fears about competing.
You enjoy an inner relaxation. To say it bluntly we are all screwed up just depends which kind and how much.
Have fun accepting YOU.