Need advice on IT Life and Stammering

Need advice on IT Life and Stammering I have stutter from my childhood days, I don't know how I got into stuttering. Now I am 21 and working in Corporate. From Saying my name to Thank you, I struggle to speak. From the past 50 days, I am writing affirmations like 'I speak confidently, clearly and fluently'. How much writing affirmations help in long run ? I am trying every hard way to reduce my stammering like speaking slowly and making eye contact while speaking to gain confidence. But still I fail. And , another important question is Are there any people who stammer and survive in IT. I need their help like how they tackle client calls, daily scrums ,etc. Second question is How much writing affirmations help in long run ?