You dont have a chest infection do you rich ?
Mine went...cold, cough, stubborn cough for several weeks, occasional breathlessness, INCREDIBLE nightsweats, eventually the doctors, hospital, xrays, ct scan, diagnosed with pneumonia and pleurisy, needed a chest fluid drain via a bloody great needle, bronchioscopy, lung function tests, antibiotics, tests for TB ..ending with pleural thickening or fibrosis because it sat there so long..all because I didnt go to the doctors soon enough.
Despite the above, I only lost one day off work, I just seemed out of sorts for ages..you can kid yourself it will clear up.
Take heed....go to the docs. You never know and guessing wont help.