I've done the same thing, when I was starting my business I thought it was impossible for someone with a stutter to run a business and talk to customers all day ect. But what I found when I pushed though it and did my best was that people really liked how I talked, it totally set me apart from my competitors and made me more memorable and they often came back! Try to stay out of your own way and you'll be surprised what you can achieve even with a speech impediment people