It’s less common I girls apparently. To overcome it, I think the most important thing is to not seek perfection. You stutter and that’s okay, you don’t own anyone fluency (and people who make you feel that way are ableist bigots). You will also have times in your life of stress, change and sadness, and it may be worst at those times and that’s okay. That’s how you navigate being a human. But I think what improved it is actually changes that have nothing to do with my stutter. I started studying something that feels really meaningful to me, I began to be independant from my parents, I met amazing people and came out as a lesbian. I became truer to myself, made my own life choices and stopped trying to be someone I was not. I think it’s what made me more confident in general, not just about my stutter