super stressed rn

Idek how old this website is, but I'm just writing a post here because I can't take it anymore.

So, i'm preparing for end of year exams (i'm from a southeast Asian country) this year and oh my god i'm so damn stressed for my exams. Sure, For the first whole semester things were really bright and rosy for my grades, considering my efforts. But my recent exams were not that good. I didn't perform as well as the other ones and failed for the first time in the school year.
This year is a crucial one, because I get to choose my desired subject combination, and I'm all out for this and I really really need the combination. But... with my recent practices for my math exams... I just didn't perform well. I got borderline marks even though it was just a practice paper. I've never felt this stress in my entire life, and I even have s__cidal thoughts now and then, which i'm aware isn't normal of me.

I just hope I can get through this.