As a person who's always been struggling with exams and stuff, I suggest you take it easy on yourself. Stress is really bad and it will hurt you.
When I was a kid I used to be the brilliant kid at school and I used to really ace every single exam given to me. Now though tables have flipped; Exams got harder, I had to work harder and I didn't, I started failing. It was a very painful time to go through, seeing your parents and everyone else disappointed it in you really hurts. So I had to get back on pace with the class and I did. It was pretty hard I admit but you'll do just fine; Life isn't about exams and school life only, take it easy on yourself, if your mental health is in question please get someone to talk to (you can DM me any time you want pretty much) and if it's your physical health get some rest.
I hope you get better soon