Journal your anxieties before the speaking situation or just before the day starts. And for each anxiety write down, “Is there any evidence that this anxiety is true?” Likely you will find no evidence that the anxiety is true, and from there, you’re mind will begin to think more rational. It’s like you gotta act like a judge and jury when it comes to your anxieties. If evidence can’t be found, then it can’t be said to be likely true.