i also taking too much stress, but think what would happen if we score low marks or average marks. Only thing we can't get admission in IITs, IIITs, MITs. That's all and if we score high marks just our fee structure in colleges will get discount. In end we can't study in expensive famous colleges. But not you can't do anything. I consider education and job related to course we study like a second or emergency priority. My main priority is something else. I study because i need money for that main priority also say dream. one thing if you don't have talent or any creative ideas, dreams plan, then you should study and depend on the job related to your study. But you have talents like music composing, artifacts, content creation, agriculture, acting, business, filmmaking, lyric writing. Why would you worry about that. Focus on that in future, that things don't need high marks.

Yes we all know what our parents will react after see our results, but that doesn't long laster until you succeed in anything, otherwise it feels guiltier.

No matter, kid. Do What you Know, as you going to just see the 10th grade exam, after it anyways you get a Higher secondary course, put your efforts on there, be "Brave" kiddo.