You've found a great place for love and advice. The only things I would add are 1) as best you can don't worry about what you don't know. As Christine said above the what-ifs can easily make you lose focus. In my experience 80% or more of the things I worried about never happened. 2) Starting today do what you can to get stronger and healthier. If the prognosis is awesome and little to nothing need be done, well you're stronger and healthier. If you are heading into a fight you'll be better equipped! Win-win.
Bless you and good luck!