hi and welcome,
After reading you history i can suspect you are suffering from acute bronchititis. It is inflammation of the air passages or alveoli in the lungs leading to mucus formation , congestion , fever
It is mostly viral infection seen post flue infections or sometimes bacterial.
i would suggest you to consult a physician and get chest x rays done for exact diagnosis.
For relief of cough you can start with amoxicillin
with clavulate 625mg 2 times daily along with anti tussive and decongesant syrups twice daily till to see a doctor.
i hope this helps,