I actually want to give up and fuck the exams

Im actually so close to just giving ut and not giving a fuck abot the exams. First og all my teacher is probably the most demotivating person ever. Second of all, i had a little mocktest last thursday to see what grade i might get on the actual on next fucking week. Now for context, the real exam is two parts, one shorter one the i have to write at leaste 250ish words and a longer part where i need like maybe 800ish at least, and the whole thing last like 5 hours. My problem is that on the fuck-ass mock test, she gave me 90 FUCKING minutes, and she dares to come to me, give it back with a grade, and dares to say i saound rushed and it was too short. Im gonna explode. And like a week before she said this might give me motivation to work harder, NO TFIT DIDNT. I DO NOT GIVE A FUCK. i just want to go home and cry myself to sleep

What whould you do in this situation, bc im kinda panicking T-T