Dear Emily
I am sorry to hear that you are ill. You will feel better if you follow the doctor advice. When you are well again, I think you'd better do more exercise, such as, jogging, swimming, playing table tennis and so on because doing sports can make you strong and healthy. What's more, you should eat more. Such as, having enough fruit and vegetables because they are rich in vitamines. Drink milk or yorygurt every day because milk can make your bone strong. It is good to out to breathe more fresh air. I hope you will be better soon.
Yours
Li Ping