Someone help me, with my past mistakes and regrets, about my life, education, and other stuff.?

I know it seems so stupid and cheesy but you could ask a teacher for extra help on things you don't understand well. Everyone will understand that social skills are taken as very important, especially in highschool and that sometimes people lose balance a bit. But you could tell your friends and ask them to help you if you dont feel you want to go to a teacher but dont feel bad, it happened to me last year when i did my exams but now im fine. I didnt do any big exams but they were the end of year ones. You also need to find a way to relax when you think about doing badly. do something that relaxes you. You can also revise by yourself sometimes or if your parents if you want so they can get to know what your good at and not so good at. Hope this helps. p.s you'll do fine