Thanks for posting your query.
There may be possibility of upper respiratory tract
viral infection with secondary bacterial infection and now also involving the lower respiratory tract.
Presence of common cold
along with pain in throat and chest pain
suggests the diagnosis.
You should consult with internal medicine specialist and should go for thorough check up.
You should also go for chest x ray
, complete hemogram and ESR.
You should also go for complete antibiotic course, throat soothing medicines, decongestants.
You should perform gargles three times in day.
Dr. Mayank Bhargava