persistant cough

i have had apersistent cough for 4weeks,received erythomicin ,and other antiobiotic,but still has not completely gone i am still bringing up green phlem,i was admitted to hospital two weeks ago for a few hours,were blood tests were carried out,xray(clear),but still could no one could tell me what was causing this i was short of breath at this point, i have never  smoked.
i have got a deviated septum and this can cause problems with mucous
at the moment my gp says it is my deviated septum that is causing he problem
and he has prescribed visclair
my ribs and side are now sore but i have been told this is due to coughing which is strained at times

it is causing me to be anxious because i have had it for so long

can  a deviated septum cause this sort of problem?

[National Jewish Health]

The deviated septum can interfere with mucus clearance but wouldn't cause your cough and green phlegm.  That is an indication of infection, either in your upper respiratory tract, such as sinusitis or your lower respiratory tract, such as bronchitis.  Sounds like you have been given good antibiotic therapy that hasn't quite cleared the infection.  At this point, it might be helpful to ask your doctor to do a culture of your green sputum and/or for him/her to consider yet another antibiotic, although if you previously have had healthy lungs, this illness will probably clear spontaneously, soon.

Don't worry about the sore ribs.  Your doctor's suggestion that it's from coughing is right-on.