when is enough, enough

I have been fighting a cough/cold for over three weeks now.  It started as a dry cough that was irritating.  Prescribed medications made the cough "productive" and now I seem to be lost in a sloppy mess of coughing fits.  The coughing episodes have diminished in frequency but the spontaneous and violent nature of the coughing has remained.  I am for the most part a healthy person.  I rarely get sick.  I haven't had a cold in years.  So, this has me baffled.  I travel a lot and I suspect I made have picked up something "along the way".  But this is ridiculous!  My new plan...drink A LOT of orange and grapefruit juice and not much of anything else.  This has worked in the past as my normal winter sickness preventative plan.  I may be jumping on the wellness train kind of late this year/winter but something has to give.  Enough, all ready!!