I have had a horrible cough for the past 2 weeks, and I sometimes go into coughing fits so harsh that the phlegm tastes metallic (There isn t any blood though). I have recently been hearing a strange noise coming from my neck/through whenever I breathe in deeply. All of the cold medicines I have tried have not worked and neither does aresol based medicine. It s getting to the point where I m having difficulty breathing because of the pain in my sides. Do you have some ideas of what I could have?