I knew this was coming, i fucking knew it, yet I still didn't do anything

I knew if I don't study Ill fail, I still didn't study. What is wrong with me? I just want to kill myself before the exam. It's tomorrow.

I really cannot imagine what my parents would feel. They think I've been studying all year while I lied to them and bunked all my classes, when I'm sitting in class all I'm thinking about what I could have done so I wouldn't lose my ex, what the fuck is wrong with me?

Please, give me some immediate advice to calm me the fuck down, and some advice that will help me change for the long term. I never change. I've promised myself millions of times, I've always been a D, E student, but when I put in effort in my studies, I went up to a B. Please advice me on what to do.

If i fail my exam tomorrow, another year will be wasted of my life (I already waster one)

I just looked at one of the past papers, and I attempted it. I got fucking 3/60.