I had bronchitis back in the summer, 6 months ago, and continue to be extremely tired and unable to exercise without starting to cough again.  I take a 1-2 hour nap after work every day and can still go to bed by 9 or 10 and get 8 more hours of sleep.  Sometimes I cough up "strings" of mucus (literally- rubbery strings and nothing else), but otherwise coughs are unproductive.  should I have concerns?  xray in september showed no masses or lesions.
If you have history of asthma, then you need to consult your doctor as it may have exacerbated, or you might have acquired some fungal infection from the history above.