Forgive me for being very direct with my answer, but I feel there is only one adult in your story and that is you.
If seems like your parents see you as a talented trophy rather than a developing child, and they forget the human being behind the gifted girl.
I suspect that you have some symptoms of depression. You can get medication for that and never properly deal with the issue, so I would rather discard that option.
You could also go for endless therapy and contemplate your navel and not get anywhere.
You decide whether that is an option.
Here is what I would recommend: find a sympathetic teacher and let the teacher help you find a way out of that program because it clearly sucks the life out of you. Does that mean you fail early in your life? Absolutely not. It means you listen to your heart and mind and insist on what feels right for you rather than become a puppet in a system that makes you physically unwell. You are one of those rare people who will succeed in life, with or without this program.
I would also recommend that you write a journal.
It works far better than any therapy and will help you discover and use your own inner resources - and you do not need to tell anyone about it.
You are a lovely lady and very mature for your age. You will find a solution and this is the first serious lesson in you putting your foot down and deciding what is good for you.