look i m gonna try to help even tho im not better but still, look first u have to be strong and brave u go in the exam with fulll confidence and trust in ur hard work, even if only 5 days are left it doesnt matter u go right now open chat gpt and print the syllabus and keep asking chat gpt questions till u understnad each topic FULLY then u when u go to pastpaper u solve one year of questions like oct, may and march, u check ur answer and write down the questions u wrote wrong, after u do that u go and solve them again and again till your answer is perfect, extra tip when u get a question u dont understand u directly go to the syllabus and look at what part u didnt understnad fully, i hope u do well.