I think Gail has about covered everything but I do want you to know that I will keep you and your parents in prayer.
Cancer has struck in my family, years ago,and has taken friends in the last 5 years so I know what you are facing. This is a very hard battle for both you and your parents.
You know the Lord and you will be calling on him more and more. Remember, thru all of this, that the Lord loves you.