I have a class presentation and i am nervous whaf should i do?

I have a class presentation and i am nervous whaf should i do? Hello i have class presentation and i am so nervous i haven’t tell anyone that i stutter in my class because i only stutter when i make presentation or when i am anxious so they didn’t see me stutter yet I sometimes stutter but they just laugh it off and they never asked me anything about it and i dont wanna stutter at my presentation do you have any advices or techniques that i can use?