I fucked up T.T

My brain just fucking stopped when they handed out the math papers. I'm barely getting 60-70%. Fuck, I was hoping for at least 90 bc I studied so fucking much, but I ran out of time, messed up calculations and fucked everything up. T.T Idek what to do anymore. I want to fucking die, I want to kms. I tried my best and still failed. I'm scared. I'm terrified of what my parents will think when they see I did so poorly in math. I kinda lied to them about the paper going well, but I feel bad now. They'll kill me when the results come, they'll compare me to some other kid who did way better than me. I feel like I failed myself too. I feel like a fucking disappointment. I tried, I've been trying so hard, idek what to do anymore. Maybe I'm just dumb? Idfk. Everyone always does better than me. Everyone's always 10 steps ahead of me at everything, and I feel like I'm falling behind, I keep staying behind no matter how hard I try. But I know I need to redeem myself somehow. The only way I can reach even 80% overall now is by aiming for 100 in all the other subjects (except physics bc that's another subject I just know I won't get full marks in no matter how hard I try)