You might find some encouragement from the story of King George VI, who spoke with a stutter. If you haven't seen the movie The King's Speech, I highly recommend it.

Winston Churchill also had a speech impediment, and yet is remembered for his speeches to parliament.

I recognize that these were people of privilege and you probably aren't, so that makes things even more difficult. But I do believe that everyone can be useful and a blessing to those around them, even while dealing with a stutter.

James Earl Jones had a stutter during his childhood, and look where he ended up in his life. One of the things I commonly see is that talking and singing use different parts of the brain, so while you may have trouble with a stutter while talking, you may not while singing. That may be something worth looking into.

I think speech therapy has strategies for dealing with stuttering.

I can empathize.

Had a friend back in school that stuttered. It was stressful as hell just watching him deal with it, so I can imagine how much stress it would feel like, even if he hadn't expressed much the same things you have.

He ended up finding some stress relief via singing, and only hanging around people that didn't put pressure on him.

Cool dude; haven't seen him in years though. He left the state for college (wrestling scholarship), and doesn't come back except to visit family, so we rarely have time to catch up.

He ended up doing technical writing, like for instructions and textbooks and the like. Freelance now, or was.

My aunt had a stutter (and my grandfather too, it's hereditary?) anyway she did speech therapy for years and is now a teacher.