What other people say is their choice and speaks more about them then you. What you do with what they say is up to you. Sometimes things hurt, sometimes something in us wants it to hurt. Maybe the pain helps make things make sense. Suffering is pain and resistance to that pain. Embrace the pain, look to your values to guide your actions. What helped me most is that I value doing things despite not necessarily knowing what I'm doing. You learn the fastest when you're doing something new - beginners mind and all that. Remember you're not your stutter, you're not your thoughts. You're the thing that thinks. Good luck! Celebrate the successes, don't let the defeats define you. You can only fail a finite amount of times until you succeed, or die trying. If that doesn't sound like something you want to do, then what do you want to do with your life?