But you don't need to loose it. You've done well in all your subjects, and your teachers love you. ( I wonder what your chemistry teacher thinks now, after you mum told them you hated chemistry...) They all compare you to state rankers and think you're a genius.
At my school... I've done well in all my subjects (Except English and Physics), but all the teachers (except my math and chem teachers) hate me like i'm some object defying all their morals and values. Which i am, because I get good marks without trying, which is supposed to be impossible according to them.