I always thought if you HADN'T had chicken pox you would get shingles.
Alas! In my case, I was over and through the whole event before I knew what was happening to me. But, I will never forget the itching, and then the extreme PAIN when I would scratch, and the internal pain ... that was really strange!
I recall a lady who talked about singing hymns, reading the Bible, praying to the Lord, and when she couldn't do any more of that, she would just sit in her chair and let God just love her.
Maybe ... God just wants to love you some more. I know idleness is not in your job description, but sometimes ... we need to slow down.
WIll be praying for you and your treatments.