请帮我看看这段话有没有语法错误

请帮我看看这段话有没有语法错误
I know that it is such a huge number,and without it,I will have to give up XX,which is definitely my dream school in the U.S.Maybe things would be a little bit different if my mother has not been so sick since 3 months ago.It was definitely a hard time for my family and me and it took so much time and money to heal my mother.But she,my dear mom,even wanted to give up the healing to save money to make it more possible for me to enter my dream school in the U.S.at the beginning.Of course I denied her original thought immediately.Fortunately,she is now becoming better and better and I believe she may leave hospital soon in the future.I seldom told others about my mom’s sickness,but here I told you to explain why I need that much money to enter the college.
这个是问学校要奖学金的时候写的一段话