What Causes Cough Along With Metallic Tasting Phlegm In The Throat?
would have likely started as a viral infection
Detailed Answer:
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It likely started as a viral infection but most viral infections do not persist for this period of time.
There is a condition called post viral cough/post infectious cough. It refers to a cough that follows a recent infection (likely viral) of the respiratory tract.
The exact reason behind post viral/infectious cough is not known. It may be due to lingering inflammation or sensitivity of the respiratory tract.
In some persons the use of an anti histamine decongestant combination is helpful. This reduces the secretions to the back of the throat that maybe stimulating the cough.
This combination would be present in most over the counter cough/cold or allergy medication.
In many cases, the symptoms just disappear in time on their own especially since you note that they are decreasing
I hope this helps, feel free to ask any other questions