Anxiety about school

I'm not getting bullied at school but for some reason, I have horrible anxiety about going. My friends there love me and the teachers care about me but every time I wake up for school, my heart starts beating really fast and I just start crying my eyes out if I get out of my covers. I can go weeks at a time not being able to go to school and it's taking a toll on my grades… Does anyone have any tricks or ideas to help me go to school more? I'm seriously out of ideas and I need to go :(