Huguenot, an X-ray would also help diagnose pneumonia. Narnia, I wouldn't worry too much. A few years ago, following a bout of pneumonia caused by Scotland, I had a cough that lingered for about 5-6 months. It was annoying as hell and also debilitating (weak and wheezy is no fun). My GP sent me for X-rays, blood and asthma tests, all kinds of malarkey. It was taking too long (wait weeks for one test, negative results, wait weeks for next test), so I went private. Ended up blowing a grand on a private GP (intravenous vitamins anyone?) all to be told I was probably still a bit weak from the pneumonia and just needed time to get over it. Gradually it went away. Probably would have gone away quicker if I had spent the thousand pounds on a nice beach holiday instead.