Doc says i have chest infection n gave anti biotics. how soon can i expect my shortness of breath to be relieved. he says i dun have bronchitis. ?

Monitor closely: If your dr is confident of the diagnosis of bronchitis ( no pulmonary emboli or asthma/ copd, pneumonia)the "shortness of breath" should improve gradually while the cough is disappearing. It may take days or weeks, seldom 1 month or more. Shortness of breath should be monitored closely to make sure there is no serious condition causing the difficulty breathing.

Probable time..,,: If the antibiotics are effective for the infection you have, your symptoms should begin to improve within a few days even though it may take a week or 2 for the infection to completely resolve. If your symptoms are worsening despite the antibiotic therapy, then you need to be re-seen by your doctor or in the er, depending on the severity of your symptoms.