Serious anxiety and self destructive behavior

[Mamas boy]

Right now, I feel like I am out of control and have very bad anxiety. It is regarding grades. I am terrified of getting bad grades because I get grounded and cant see people outside of school. I am terrified of not having friends because of this and am constantly trying to get good grades so I can get ungrounded. However, Everytime i have an assignment or studying, I am constantly worrying about failing. It is eating me alive. I am worried about getting kicked out of my school because I might fail a class. Help.