Answer in Details
If you are facing surgery, you may choose to chant mantras such as the Maha Mrityunjaya Mantra:
"Om Tryambakam Yajamahe Sugandhim Pushtivardhanam
Urvarukamiva Bandhanan Mrityor Mukshiya Maamritat"
This mantra is believed to grant strength, healing, and protection from harm. Surrender your worries to Lord Shiva, trust in his divine will, and have faith that he will guide you through whatever comes. Ultimately, the outcome rests in his hands, and he grants peace to those who seek his blessings with devotion.