What is the best dua for curing ulcerative colitis intestinal disorder?

asalamu alaikum i have been suffering with this disease for 2 years and its awful i have bloody diarrhea severe weight loss vomiting extreme pain. nothing is working the only option is surgery my doctor said but i dont want to go through that, can anyone tell me a powerful islamic dua for healing my disease for good i want to be healthy and worship Allah SWT to the best of my ability but i dont have the health jasakumala thank you in advance