I always thought of lung cancer as a smoker’s disease, so I was pretty astonished when I received my own diagnosis in December 2019. I’d been exposed to a lot of secondhand smoke growing up, but I’d never been a smoker.

I went to a hospital close to my home in Oklahoma for my treatment initially. I started chemotherapy there and had surgery to remove the upper left lobe of my lung. But when my surgeon discovered that the cancer...