Did you receive a copy of the radiologist's report, and if so did it include a Lung-RADS category for the nodule in question?
In October, 2015, a nodule was discovered in my left lung during a routine chest x-ray. My family doctor's Physician Assistant (PA) ordered a PET Scan, which showed no "lighting up" and the PA said we would watch it. Fade to March, 2018, and I asked the PA during the regular physical exam if maybe we shouldn't check it again--she had forgotten about it. The subsequent CT revealed that the nodule had grown in size (doubled but was only 1.4 centimeters to begin with), but nodules don't normally grown. She sent me to a Pulmonary Specialist who ordered a PET scan prior to my visit with him, and at my appointment, he revealed that I had lung cancer and immediately scheduled me with a Cardio-Thoracic surgeon who performed a lobectomy of my upper left lung lobe. So, if I were you, I would have any nodule in the lungs checked regularly. By the way, I smoked for 25+ years and had not smoked for several years at the time the cancer was discovered.