Doing a presentation and having a stutter is quite challenging especially when it's the time when it's the worst, I recommend making a script and try Saying it out loud in your room or anywhere you want and keep repeating it, this is what i do and most of the times it comes out great, just don't fear when you stutter Infront of the people, i mean at first i did but then i realised there's no point of fearing, this who i am. i hope it helps 🌹, feeling Stressed, anxious,or feared is very normal just don't make it affect your performance.