hello meenal..this is dr xx..would be better if i know a more detailed history..cough cold fever for how long,,do you have any allergies..is your problem persisting for months and repeated every year(bronchitis) your premises of residence (certain weeds)..most of the times it is mild seasonal infection..all you may need are antibiotics ,anti histaminics(antiallergics).decongestants for few days.after few blood tests(to rule out severe viral fevers, malaria.. etc).on the advice of a physician..if not relieved or getting worse. persistent even after the treatment ..consult a chest physician or pulmonologist..do not worry ,this is a very common problem and you will get well soon..bye