I Have presentation and i really in presentation beacuase of my stutter

I Have presentation and i really in presentation beacuase of my stutter I study software engineering, and I have a presentation coming up again. The last semester went really badly for me, and I was stuck and couldn't let a word out all the time. We are going to be in groups, and each person needs to speak for 3 minutes. That sounds easy, but I can't stop thinking about it. I ram in pressuse. I can't even sleep. I stutter all my life, I got used to it, none laugh about that, not what I worry about. I really dont mind if someone laughs at me, i have many friends and had few real relationships, and I'm trying my best but when that come to this presentation, i cant stop being in pressure, and then i will be unable to speak because of it. TL:DR: I have presentation that i have to speak up for few minutes and i can't stop thinking about my sutter