Mother is trying to control my school life?

The answer posted by "?" is fairly reasonable, but a guidance counselor may be more helpful. You should discuss your situation with your school's authority on future planning (at my school this was the guidance counselor). You sound like you have clear and responsible goals for your future education, but double-checking these with the counselor could help, and the counselor could also help to address these issues with your parents. Having a informed adult on your side certainly couldn't hurt. Regardless, I hope everything works out well for you.