Yes I do but when I think this way, I just remind myself how non important my life is in the eyes of the universe. Our suffering matters as much as other's people happiness... means nothing. Because of that we can embrace the nothingness and live our fullest lives (doesn't matter if we stutter or not). Don't let it stop you. If you want to say something in front of someone but know you'll stutter, just say it proudly and STARE them in the eyes, they can wait. Learn about philosophy of absurdism, it genuinlely helps.