Anxiety before class

Anxiety before class I'm a junior in high school with a moderate to severe stutter. I'm currently taking university level English while in high school. Every day before going to this class, I get awful anxiety because I feel like I'll have to a spontaneous presentation, talk in class, read to the class, etc. It's really bothering me because I want to be relaxed so I can learn, this class is tough as it is. Do any of you experience this? How do you overcome this anxiety or fear of going to class?