I'm gonna be honest my issues with anxiety surrounding my stutter stopped when I realized that literally nobody cares that I stutter except for me. Sure people notice and sometimes that sucks, but honestly the thing that helped me the most was finding coping methods for my anxiety in general because for me personally there was a large correlation between my anxiety and my stutter. When one went up so did the other, but when it was down my stutter was barely there. That's just my perspective, I hope you find something in it that helps even though I couldn't rattle of specific things for you to do. Good luck!