I got 2 Us and a E and a D after AS and no school accepted me for A2 or even AS with the subjects I do.They told me to change subjects...No i am sitting exams privately and getting High B's.Teachers told me u couldn't do it and never gave me another chance.Now look at me , next year going to study engineering in a top 10 university and having a better career than them.For whatever reason u don't do good,keep pushing yourself next year and aim to make yourself better.All in all its worth using the extra year or 2 to do good in your alevels compared to just giving up.This is from someone who has gone through the pain.