I‘m in the same situation, also M 18 years old. Been to different therapies for many years, tried L-Theanine, Ashwagandha etc. I‘ve heard that psychedelics may help, **they can be risky** though and you’ll need a trip sitter and a good set & setting. I‘m planning on trying LSD in a few months. Sadly there isn’t a official way to do this in most countries. The documentation "fantastic fungi" briefly talks about a guy taking a heroic dose of psilocybin mushrooms and getting rid of his stutter. **(This is dangerous).** Sadly there isn’t a lot of research yet with stutter, but I can’t keep waiting for the research. I want to start having a happy life. **This probably isn’t the most responsible way to go about it.**