Rocky, I don't know you personally so vicarious will do. You can do this. I have much faith in Mayo Clinics.
Pick out something reasonably attainable that you really want do in a reasonable amount of time after the Docs are done with you and keep your eyes on the prize. It can help you through some tough times which you will have, sad but true.
When you get down to it and tough is all you've got, remember tough is enough.
Been there. Done that. You will prevail, but be smart.
Best wishes.
