It does not come out good to do the operation. I will send blessed mantra water to you; this seems the best. It will take a little time for me to bless the water, as it needs thousands of mantras. You should also bless water yourself  and drink it after blessing it with Black Manjrushri mantra and practice. 

How to bless the water:

• Place a container of water in front of a picture of Black Manjrushri. Beams of nectar are emitted from Black Manjrushri’s heart and bless the water in the container, so that it will purify you. Visualize this very strongly and visualize that it purifies the four things (spirit harm, negative karma, disease and defilements).
• Recite the mantra as much as you can (at least a few malas each day). For the last 21 mantras that you recite, visualize that you receive all the qualities: omniscient mind, compassion, and all the rest of the qualities. After each mala blow on the water. Then sip the water several times a day.

Also, bless the same water with the Vajra Armor mantra in the same way. Each time you drink the water, think that it purifies the four things and brings you to liberation and enlightenment. Think that your negative karma and delusions, which are the source of the sickness, are completely purified. After drinking the water each time, strongly generate faith that everything is purified.

Drink the water early in the morning before sunrise, before midday, around 3pm, after sunset and before going to bed. At least drink this amount, but you can also drink more.