Hi and thanks for your query. Flu symptoms are usually of viral origin and do not require antibiotics. However, after a flu, this could be a fertile ground for the breeding of bacteria and development of a bacterial infection. In is certainly the case for you. You got a bacterial infection of the nasal pathways, that has also irritated the olfactory nerve endings, reason why you got difficulties with smell. The smell sensation is usually regained in about a week after the infection and irritation is cleared off. Treatment involves nasal lavage with a saline solution and prescription of an appropriate broad spectrum antibiotic (Amoxicilline-Clavulinic acid could be appropriate). An analgesic can be associated if necessary. consult your family physician for reevaluation and management. Thanks and best regards, Luchuo, MD.