I have had a cough since the middle of October- had 2 courses of anti-biotics and been told it's upper respiratory. After 6 weeks it started to get better and I had about 3 days of coughing less. Last week I got a cold though and of course cough is back as bad as ever. It is tickly and chesty at the same time - I am constantly coughing up yellow phlegm but yesterday I started coughing up what I can only describe as 'skin' - yesterday I had a piece that almost looked like a fern with central stem and kind of leaves. Today only little bits but when I looked closely and felt it, it is like the thick skin you get on a blister or something. I can't seem to get a doctor to take me seriously but I am feeling quite desperate now. I can't take another night of not sleeping and am starting to worry that something is seriously wrong with me as I just can't shake this off.