I have an important presentation today for work, I'm nervous and trying to stay positive

I have an important presentation today for work, I'm nervous and trying to stay positive My stutter is moderate and not generally a huge problem...except when I'm teaching or presenting live. I teach mostly online courses where I record voice-overs and I read one line at a time and edit them together until they're perfect so no one knows I stutter. A few years ago, I had a major health issue and was taking huge amounts of steroids which gave me an incredibly severe stutter (because stuttering is a side effect of steroids). To a normal person it's not so bad but when you already stutter, it's awful. During that time, I was laid off from a job I had worked for 4 years and I was able to start a new job promptly. But when it came time for my first presentation, I stuttered all over the place. They removed me from all projects and I was laid off 3 weeks later because they said they "couldn't find projects for me." I didn't even work there for 6 months. I'm better now and my stutter is mainly under control. I have had excellent presentations since that one incident and I'm trying really hard to focus on the positives vs. negatives. I'm a business owner. I'm a teacher/corporate trainer. I'm a developer. I'm a woman. I have achieved a lot in spite of my stutter and I'm not going to let it get me today!!