28/f/smoke10 yrs, quit 4 yrs ago. 2mm sub plural lung nodule in periphery base. What are chances its cancer? Very scared. Have to wait 6 months.

Unlikely Cancer. At 28 years of age even for a heavy smoker a 2mm nodule would be unlikely to be cancer. The recommended follow up of a 2mm nodule should be 1 year, not 6 months , however, because it is so small growth will be almost impossible to determine. If you quit smoking at age 24 then your total number of pack years of smoking (total exposure) is low. It is highly unlikely that this is cancer.
Near zero. These little 2mm things are almost always healed granulomas. Here in kansas city, most of us have one from having met histoplasmosis.