dear user you seem to have chest infection and you shouldnot worry of that..about treatment you can take prednisolone as it will help alot to improve cough symptoms and nasal congestion .......you should also drink alot of warm fluids that will make you better ......you should also have bed rest and no severe effort ...... avoid smoking and avoid odours like perfume ....you can gargle your throat if feeling soreness with saline as simply it helps to decontaminate your nose from secretions.. ...... ......some times we require sputum culture for investigation if symptoms get worse but now you not need that but till now you need not to do that.. some times certain foods like fish and milk increase these symptoms ..if you noticed that you should avoid this food if bacterial infection suggested in some cases you can take amoxicillin or erythromycin as it is antibiotic has great role in treatment of bacterial infection wish you health