You need to have an Xray chest pa view done and in addition you need to start antibiotics .
Antibiotic will help and will make the chest free of infection and you will feel better.
In addition it will make nose better and phlegm will decrease.
You also need to take decongestants oral and nasal drops.
syrups for relief in throat and cough.
Take care of reflux or acidity or heart burn , if you have it the take following precautions--
Keep head end of bed elevated.
Avoid alcohol, Smoking
Do brisk walking daily
Go for walk after dinner
Avoid spicy food
Avoid late night coffee