Do you stutter when you speak on your own? Maybe read a book aloud. If you don't stutter then it's fixable up to a point. I have stuttered most of my life (56M) but managed to change things around. In 2015 I reched a low point and need a way out. I started studying how fluent people spoke and applied this to my speech. And gradually I broke my stuttering habit and started to speak a lot more fluent. Hitting 80% to 95% fluency now, whilst before I was around 50%. Listen carefully on how you speak and breathe compared to how a fluent person speaks. This might not work for everybody, but it worked for me. Good luck!