I really feel for you, I know how hard it can be doing a bioscience degree where everyone around you is constantly making you feel you need to compete for good grades. I am currently feeling really down im in 2nd year and have exams. the pressure is too much, i constantly feel like crying all the time and i cant express this to anyone. we also have in person exams which i find unbearable to see other people discuss their answers.
I would suggest though to feel better is to have at least an hour of sleep and relaxation/meditation (this works for me) during the day since it would take your mind off. Also, there is always light at the end of the tunnel and there is a positive plan in everyone's life that will eventually happen. Hope it helps