My mom had colon cancer at 76, had surgery and chemo and was clean by 77, then had shingles twice and convinced me to get the vaccinations which I did. At 78 she died of a heart attack. The only blessing is this was the December before Covid hit.I read an article once that said most seniors close to death get shingles.
It sounds terrible!
Hopefully you get through them quickly. I know from mom, they are no picnic at all!