Quick background, he's had one cold/virus/bug after another since starting full time nursery in Jan, which I know is to be expected. The last few weeks he's had a really horribly green phlegmy cough so I took him to doctors, he was prescribed amoxycillin (sp?). the course finished 3 days ago, but his breathing is really crackly and he still has a phlegmy sounding cough, but he only coughs occasionaly. It's the crackly breathing that's worrying me, any advice please???