Anxiety At School

I am in the bathroom at school having the worst anxiety attack I have ever had. I can’t go to class because of my anxiety and I don’t have anyone to talk to about this (I go to therapy on Wednesdays but I feel like I don’t have anyone right now). I’m crying and shaking and having breathing problems (I have asthma when I have anxiety attacks).

Any tips on what to do? Or how to reduce anxiety? Or anything that will help me?