A few days ago I developed a slight cough which I thought was nothing to worry about, coming forward a few days the cough has turned into a deep chesty cough with a metallic taste, i'm also coughing up a lot of green sputum and wheezing a lot more than usual (I have a asthma inhaler) I also find that when I wake up I am sweating but only on the left hand side of my body below the ribcage. What could this possibly be? I have a appointment with my GP but I am curious to know in the meantime, Thanks for replies in advance.