I have a similar story. I've been cigarette free for 14 months except for one Cuban cigar I smoked with my bro-n-law as we chatted on the back porch while sipping Gran Centenario Anejo Tequila and drinking Genesee Cream Ale.
They found a spot on my lung May 2016. When I left the doctors office I
threw a 1/2 pack out the window and never lit another cigarette.
I had surgery to remove the upper lobe of my right lung, that was almost exactly one year ago today. Lymph nodes they removed from the area proved to be cancer free. I've had 3 follow up with the Oncologist with good results.
Lots of people have asked me how I seemed to quit smoking so easily to which I reply "I was highly motivated"
vaping is a crutch for the nicotine addicted which I have accepted.