@malcorozan
I know how unsettling it can be when you get news like you got from your doctor.
Every case is different because people are different. The uncertainty was the hardest part for me to deal with but I realized quickly that the stress thinking about it was not going to help and more likely could make things worse.
What I did was to improve everything I possibly could that was in my control and then fully accept the things not under my control.
I got rid of (or limited) any toxic or negative people in my life. I put my body in the best shape I could to make it as healthy as possible in the event I needed surgery at any time. I researched and interviewed the best doctors and hospitals that I had access to in case I needed surgery and made sure people close to me knew my choices. I changed my eating habits and improved my diet and the foods I ate. I lost excess weight, (45lbs, but I'm 6'7" so I didn’t really look heavy), and adopted a doctor-approved exercise program. I also got "my affairs" in order to the extent possible.
I basically took a body, mind and soul approach. I learned how to meditate and focused on letting go of the things out of my control. I changed my approach (and response) to adversity and monitored my blood pressure to help train me to remain in a calmer state. But once I really accepted the fact that the things out of my control were truly out of my control, I finally accepted that the worry I had was really the only thing left in my control. And the worry was not helping my condition or state of mind. I finally, years later, went in for surgery and I felt a complete calmness on my way to the hospital, even as I was wheeled into surgery. I did everything I could to improve my outcome. It was out of my control now, except for my state of mind.
I hope you can find the peace that I found, that can be so elusive to people. I think of it as a healthy surrender.
Good luck!