It will pass, I was you just a few years ago, I had a teaching job that's mandatory as the final step of graduation in my country, somehow my stutter became extreme out of nowhere, I had 0 anxiety and didn't care what people thought of me but the stammer by whatever reason was just worse, I could not even say single alphabets, i would have over 5 minute pauses, there were very embarassing moments. But do you know what? It did affect me, no denying that but why should i sulk and be bitter for something that isn't my fault? Something that has and may continue affecting people for years to come? My advice is take things one day at a time, enjoy your life and do things you want to do regardless of your stammering? Do you want to be 90 years old and still give a fuck about your stuttering at 20? I know I don't, do everything in your power to build your self-confidence, and then just live your life, stop the expectation anxiety of thinking you'll stutter and just do what you want to do, I know that sounds hand wavy to a lot of your problems but what other options are there? Make sure you rock whatever field or position you find yourself in so people who laugh at you can never meet up with your drive and results.