I might go insane.

Im 16 from iran. its been a week since schools have started. im at high school now. i have 15 long books to read. last year at the final exams and i pushed my limits too much. i studied to much and well i failed. ever since then ive became a depressed and stressed person. i live in a bad city. Some of my teachers arent so good at teaching. and everything is making me stressed. i have to go to school 7 hours a day it was 5 hour but they added more. Im trying to be successful but im not built for this. i keep thinking about my future exams even though they might not be hard. when i come to home i cry for hours everyday. My parents dont understand me they just say everyone are like me and they dont care about my success or school. ive became mentally unstable. i asked priciple for 5 hour but it rejected. now i go to school at 7 in the morning and come at 2pm in noon. i cant sleep in noon anymore and everything is fucking me up. and i can barely keep myself awake til night(if i sleep afternoon ill have problems sleeping at night). Its been a week since im in 10th grade and im suffering like this. 11th and 12th might be worse considering the fact that a 10th grade book is 100 page and 11th its 250.