Any way to control you adrenaline ?

Any way to control you adrenaline ? I am sick of my college,my grades are rock bottom and all because of my stutter, even the kids who used to laugh at now just look with pityfull eyes and treat me like trash, teachers dgaf... everythime our class gets over we have to give our roll calls and my anxiety start as soon as the class reaches its half time all my focus goes to time just waiting for my roll call and soon as my number comes not single word comes out and my neck start shaking and palms stars sweating. Does this have do with my adrenaline because it just happens at that moment only and then I am calm (after stuttering) and then the cycle continues for 10 more classes. So does anyone has anyway to calm your self?