Hello,

it would be better if you provide that in which class you are in, I will tell you your option assuming that you are in 11th standard,

Every School possess an option of giving the student a facility of changing their subject if he/she doesn't feels comfortable in the assigned subjects but this option is available for limited duration of time for eg. from the day you start your 11th standard to the next 3/6 months varies with schools, one can change his/her subjects.

so consult your School authority and take a serious amount of time in deciding what you want to pursue.

Hope this helps,

All the best !