What to do with stuttering

What to do with stuttering Hello, the text may have errors because I am writing through a translator. I'm in the 10th grade and I started stuttering when I was 4 years old. We have a test in English on Tuesday, and we have to learn a text on a certain topic and narrate it. But the problem is that when I get nervous, I can't even make a sound. On Thursday in literature class I was told to read. I read 4 words in 1 minute. Can you tell us how to calm ourselves down in stressful situations?