Dear Li Mei,
I’m sorry to hear that you have too much pressure and don’t sleep well at night.
Your parents want you to get good grades，so they send you to all kinds of after-school clubs including language learning, music, math classes and so on. And you really don’t know what to do.
I think your parents really love you and they hope you have a wonderful future. If you feel uncomfortable, there are many things you can do. You could talk about it with your parents. You should tell them that kids need more free time to relax. At the same time, you should study hard and try your best to get good grades.