Breathing is so important. Try changing the cadence of your speech, speak Slow. Rhythmic. If you have blocks, try re-arranging your sentences. I have phrases that help me kick start sentences like; hi everyone, I’m…. There are a handful of techniques that a professional can give you. If you stop caring about peoples perception of you that can help you communicate even with a severe stutter. All of this is of course easier said than done. Don’t give up. Goodluck!