Thank you for all the information,
Sometimes after a viral episode bacterial infection supervene.
In infection you can have metallic taste in the mouth.
Though you are having dry cough, still physical examination by doctor should be taken.
OTC Benadryl or Mucinex DM or Tylenol cold can be tried.
Chest X-ray, blood count can be needed.
If there is pneumonia, you may need antibiotic.
I suggest to consult doctor as soon as possible.
I hope this information helps.
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