Take deep breaths and speak and say your name while holding your breath. I struggle with Speach impediment extensively also I had did a Speach course last year and receive great results from it. It all has to do with our mindset, if you notice also that your heart begins to beat harder whenever it’s your time to say something, this tighten up your speaking ability which makes it harder to say something. Just remember take a deep breath and speak while holding your breath, or take a deep breath before you speak When people stuttered, air flow is blocking which makes it harder to breathe and this alter speaking extensively 🙏🙏🙏 Try this process each day and you will see the result. Our brain plays a major role in the way we speak also