Been ill with pneumonia since july 2012. X-rays. Clarithromycin."a little bit of chronic scarring bott. Left lung" 04.2.42. Lung specialist be best?

Yes. Nobody has pneumonia for 4 months. Someone saw something abnormal on your film and called it pneumonia, which is reasonable. But if the abnormality doesn't go away with treatment after a couple months, its probably not pneumonia and yes, you should see a pulmonary specialist.
Yes. You should see a lung specialist to confirm the diagnosis of 'pneumonia since july' and get treated accordingly.