Very sorry to hear this. I don’t know your belief but the following is a prayer I say on my infusion visits. I should say it daily at least.
MOTHER OF GOD, HEALER OF CANCER
O All-Gracious, most wondrous
Mother of God, Pantanassa,
Queen of All!
I am not worthy that thou
shouldst enter under my roof!
But as Thou art the compassionate
Mother of the Merciful God,
say the word that my soul may be healed
and my weakened body strengthened.
For Thou hast unconquerable might,
and all Thy speech hath power,
O Queen of All!
Do Thou gain the victory for me,
do Thou supplicate for me
that I may glorify
Thy most glorious name,
always, now and ever,
and unto the endless ages. Amen.