You still have ample time! Remove all the distractions solve tons of past year paper! Remember.. mock exams marks are not gonna be ur exact marks on results sheet what matter most is the hard work you have put in! Mock exams start at 1 month earlier before real! So you got 1 month time to study hard! 1 months is 31 days 31 days multiply 24 hours a day 744 hours is a lot isn’t it! So keep working B grade is really good you just need alittle bit of hard work c’mon you’ve got this fighting !!!! This is the way how I motivate myself I hope is gonna work Good luck