Hi Dave,
I think "concern" is normal, all things considered. You are a very reasonable guy and you will likely temper your concern with reason.
I am saddened tonight about your having to even think about possibly dealing with more of anything medical.
You are a strong man, on many levels. I believe you can cope with whatever you decide you want to take on. My concern isn't about your ability to endure. My concern is more about the many ongoing challenges and how these challenges may affect your quality of life and your everyday sense of joy.
You aren't these conditions and you are very skilled at transcending these immense physical challenges.
Even so, you deserve a break.
I am praying for your healing.
Warmly,
DejaVu