Please heal my Mom!

Dear St. Rita,
My mom is coming to an end after a year-long battle with cancer. The doctors have said my Mom has no chance to make and she will depart in the next few days. Oh, holy St. Rita, I come to you, knowing you are the Saint of the Impossible, please, I beg you from the very bottom of my heart, heal my mom. I believe in miracles and I KNOW you can deliver this "impossible" cause for me.
Amen