you should probably do Medicine Buddha sadhana. if you are interested i have a book where there is Medicine Buddha visualization and it works to heal completely the illness or sickness if its not karmic problem per se. if its just adventitious conditions as said in the book Medicine Buddha will work to heal it perfectly. also you can find the Medicine buddha sutra. and you should ask CNNR to give the medicine buddha mantra lung during his next retreat.
If the thought of demons
Never rises in your mind,
You need not fear the demon hosts around you.
It is most important to tame your mind within....
In so far as the Ultimate, or the true nature of being is concerned,
there are neither buddhas or demons.
He who frees himself from fear and hope, evil and virtue,
will realize the insubstantial and groundless nature of confusion.
Samsara will then appear as the mahamudra itself….