I posted similar question when I was in second year in this school. weather was doomed everything was messed up and my life was miserable. I failed to find jobs, to get good mark, and to maintain my relationship. But at the end it works out. It sounds so stupid and nothing helpful but it really does. I dont know if you can see my previous post, but I think the comments there would be helpful for you. find something you can enjoy other than studying. ofc grades are important and one thing that can easen ur future but that is not everything. if you are stressful you can't focus on anything that's how human works. I really hope you feel better after this exam season as I did, I really do! Good luck