Hi there. Thanks for the query.
, itchy eyes and running nose are allergic symptoms and should respond to some anti histamine
with nasal decongestant like cetrizine
with some nasivion/otrivin nose drops which are available over the counter. You probably have some sinusitis
due to this allergy, and the phlegm is dripping to your throat causing the cough. Metallic taste
may be because of antibiotics.
Try the anti histamine, once a day, decongestant nose drops, thrice or four times a day and do some steam inhalation thrice a day and you should be on the road to recovery.