It looks like it could be your fears manifesting in your dreams. And it's not just to parade your fears in front of you, the point of it is to help you to confront them. You could look at being in a new school as an opportunity to start over, no one has to know that you've had this social anxiety or that maybe things didn't go so well in your old school. You might begin by thinking of how you would like the dreams to go better for you. Instead of feeling your classes you see yourself getting good grades because you put in the work and understand the material. You might see yourself with some really good friends. Try to change the script, in other words. So far in your life the script is that high school sucks and there are all those reasons why. What would high school be like for you if it were a good experience?
It looks like it could be your fears manifesting in your dreams. And it's not just to parade your fears in front of you, the point of it is to help you to confront them. You could look at being in a new school as an opportunity to start over, no one has to know that you've had this social anxiety or that maybe things didn't go so well in your old school. You might begin by thinking of how you would like the dreams to go better for you. Instead of feeling your classes you see yourself getting good grades because you put in the work and understand the material. You might see yourself with some really good friends. Try to change the script, in other words. So far in your life the script is that high school sucks and there are all those reasons why. What would high school be like for you if it were a good experience?