If i smoked, should i get tested for lung cancer?

Yes.: If you smoked, you should definitely get follow-up to be sure you don't have lung cancer. This is really important if you still smoke now. If you quit, your risk of lung cancer goes down with time, to the point of being similar to non-smoker risk. But you should get follow up with imaging studies of the lung, and other lung tests.

Screening: The national lung screening trial demonstrated survival advantage in patients who underwent low dose ct scan screening and were high risk. High risk is defined as heavy or former smokers (quit within 15 years) and aged 55-74.

Health maintain: Collaborative health maintenance is critical to your health. If you smoke, you should stop. There are guidelines and recommendations as to who should undergo testing/screening. This may help: http://www.Cancer.Net/publications-and-resources/what-know-ascos-guidelines/what-know-accp-and-asco-guideline-lung-cancer-screening/recommendations-lung-cancer-screening.