I Have Had A Cough For 6 Weeks Or More.

I have had a cough for 6 weeks or more. Probably started out as bronchitis and had bad cough even got a fractured rib from coughing. Cough finnally went away but cams back about a week later. I have continued to cough for several weeks which aggravates my fractured rib. I have had 2 chest X-rays which showed no pneumonia and only the the broken rib. I have taken prescription cough med, eaten hundreds of cough drops, an antibiotic. After coughing several weeks I was given an inhaler and codizone pills which I finished about 3 days ago because I did have some wheezing. I am a very healthy person and take no reg meds. I am basically no better where do I go from here.