My stutter is at its all time worst and I have a speaking exam on Monday

My stutter is at its all time worst and I have a speaking exam on Monday My stutter has gotten a lot worse since I went back to school in September and on Monday I have a French speaking exam and I have it all memorised in my head but can barely get the words out. I don’t know what to do. I have a really good French grade too and I don’t want the speaking exam to lower my grade.