Just my experience but I overthink everything and make up scenarios that will probably never happen. I can end up in a downwards spirals and maybe picture my wedding day and wonder if I will be able to say "I do" without stuttering. Even though I am the farthest you can be from getting married. Or I wonder if my friends and the people around me genuinely like me or if they are just my friends out of pity. It's weird how just a little trouble with your speech can have such a huge impact on your life and give you so much fear. I try not to let it control my life but I have bad days now and again when I just end up in this spiral of overthinking and self loathing. I think it would be really interesting to see how the stutter affects the character. How their personality will be. Every stutterer is different but this is just my experience.