Calcified Granuloma

Back in July 4, 2005 I went to the emergency because my back was hurting they did a CT scan and found a couple of things wrong.  One of them was that I showed a granuloma in my left lung no measurements where given.  In Dec. 9, 2006 I had another CT scan and it also showed that I had a 7 mm calcified pulmonary, and I just recently repeated another CT scan, but now it shows that I have an 8 mm calcified granuloma in the left lobe.  Do I need to be worried?