I have been in your shoes so I understand how frustrating it can be. We even share the same age group as well as the problem. The bottomline is: Never give up and keep your focus on improving yourself! I have been stuttering for as long as i can remember and i used to stutter really badly till i was 21 years old. There were times when i would get stuck mid sentence and I wouldn’t be able to complete it. It was very frustrating to have all eyes on me at that time, people waiting for me to finish my sentence, some would be trying to not laugh, some of them trying to guess the next word i would be speaking. Trust the process, it will get better. You are generating value for your organisation and that’s why they hired you in the first place; they wouldn’t have hired you otherwise. There’s absolutely no point of quitting..it’ll only deteriorate your mindset more. Feel free to shoot me a DM if you want to talk to more about this.