Richard, I echo all the good wishes that everyone else has sent you. It is natural to think the worst but there are a hundred and one other things that could be wrong with your chest and like most people have suggested, a virus infection is the most likely. There are some nasty ones out there at the moment, that don't always respond to first treatment. I too am suffering from an infection which involves the lungs, so there are a lot of chesty things around just now. I will be waiting to hear your news, and send all my good wishes and good thoughts to you. love busy_lizzie