Courtney...I am so so SO SORRY to hear this.
I will answer only because I would have no second thoughts if in your position.....you have a family who loves you and needs you....You have to think of YOU ...
I know you must have the heaviest heart thinking about this kind of decision... but they can cure you and that should be #1. I feel so bad for you....I don't know what to say that can make this easier but you have my prayers.......
What a hard hard thing you're going thru....and I will pray you can get thru this and lead a long long life with your family.