Break the Anxiety
Anxiety can become a habit and one of the best ways to break this bad habit is with systematic desensitization (SD).
Basically SD is pairing relaxation with anxiety provoking images. Because the relaxation response is stronger than anxiety (when you practice relaxation), when you pair those two together then relaxation wins and anxiety loses. Watch this video to see how to use SD to win your battle over anxiety.
I recommend a free mental game e-book from International Golf Psychology Association.