My clients have been using this three-tool approach to reducing stress, anxiety, and fear with reasonable success:
1. Realize that all of us deserve to not be shackled by worry, even if you've made mistakes. We all have.
2.As soon as a worrisome thought enters your consciousness, quickly replace it with a productive activity.
3. If you can't distract yourself, ask yourself, What's the most likely positive outcome?" That'll ease your anxiety. Then, "What's the worst that's likely to happen? How could I cope with that?" You could, couldn't you?
If you try this strategy or a variant thereof, let me know how well it works for you.