Thanks for your query at DoctorSpring.com
The symptoms you have looks like more of mild to moderate infection. However I cannot just rule out the possibility of cancer just with this.
I would like to know about your exposure to traffic smoke / occupational hazard / exposure, etc.
However, if these symptoms persist you can consult your family physician for a low dose CT screening in case of any strong clinical suspicion.
Please revert in case of additional queries.
Patient replied :
Thanks for getting back to me. In response to your question about exposures, I am a non-smoker, am not exposed to air pollution or secondary smoke, have had no contact with radon, and always have worked in a clean office environment free of occupational hazards. I have no problem inhaling fully, and the Mucinex/Zythromycin have made a noticeable improvement in reducing the mild wheezing when exhaling -- pretty much eliminating it unless I am very forceful. Today, I am trying to force up whatever is left in my lungs. I have been able to produce a small amount of yellow (zero blood) -- but only with forceful effort and still mostly clear. I always have had and still do have significant post-nasal drip, which was perceived to be the most likely source of the persistent dry cough. I hope this information responds to your query regarding environmental exposure. By the way, given the clean chest xRay last May and assuming a malignancy now existed, would odds favor it being in an early stage? That should do it from this end. Thanks.
X-rays can be still negative. If you want complete clearance of your doubt, please do a chest CT screening.