I have the same thing as you. The occasional and very random fluency blocks that result in me either making weird faces to over come them, or using filler words (my go to is “like”) to get over the block. I also have social anxiety from this. Theres been so many occasions where I thought of something brilliant to say to an individual or group of people but chose not to in fear of experiencing a fluency block. Here are some things that have helped me improve my fluency habit and help with confidence in my speech: (For context I’m 27, been dealing with my speech issues since grade 4) - notice how I don’t refer to my fluency habit as a stutter, disability, or any kind of severe self-diagnosis. Your brain is very powerful and I believe you can trick yourself into making your speech worse. On the days I’m throwing myself a pity party over my speech, it inevitably gets worse. Verses days where I wake up and tell myself “you don’t stutter!!!” I have a good “talking day”. - read out-loud. Regardless if you read books, Reddit posts, tik toks whatever you read on your spare time, read it out-loud. I personally find it as an effective form of practicing fluency. - relax your face before speaking. Unclench your jaw, relax your brow muscles, un scrunch your nose muscles. Be aware of your facial tightness, especially in scenarios that spike your nerves. It’s really hard to speak when all the muscles in your face are hard as a rock. - make fun of yourself. Some may disagree with this point but I personally found it works for me. Let’s say you’re talking to someone and you have a block and get all messed up. Laugh at yourself and be like “holy shit I can’t talk today” and keep on going. Don’t be so hard on yourself when you don’t speak the way you want to. - remember that people don’t notice the things that we do. You may think your speech is awful and severely embarrassing, while others will barely notice. One time I was talking to a classmate and she paused and apologized to me for her stutter, mind you I was in class with her for over 4 months at the time and never noticed she had issues with her speech. We are hyper critical of ourselves. - deep breathing exercises. Practice daily. Sorry for the essay lol.