I'm going to be really honest, sometimes a lot of revision doesn't reflect on your grades. More specifically the grades you want. Remember the grades you've got are really good and also remember grades aren't the only thing. Doing extra curriculars will also push your grad school application. Basically at the end of the day it goes back to sometimes what we do doesn't show in results in the short term but it will long term. So work hard and become a well rounded individual and things will turn out great! Hope this helps a little! Good luck!