Just got results of 3rd CT after abnormal Xray taken 9mos ago. Pulmonologist & radiologist suggest a 4th in 2mos. Original & 2nd CT showed 3mm subpleural nodule in right upper lobe anterolaterally. Now 3rd CT shows 5mm subpleural nodule in right upper lobe anterolaterally, lungs otherwise clear without evidence of infiltrate, bronchiectasis or pleural effusion, except for a tiny parenchymal scarring in left lower lobe posterolaterally. No Hilar or mediastinal mass or adenopathy. I'm 51, 5ft8in, 148lb, physically active, never smoked, take only premarin, Allegra D, Nasonex and Astylin for non-allergic rhinitis. No health concerns other than occasional tiredness. What would you do if you were me?