Hi bellaam2,If you have not done any other Rhinoplasty procedure aside from septoplasty, then hitting the nose should not have any impact on the septum unless the force was so strong it caused some bleeding.
Please heed your surgeon's instructions. Medications like Afrin work by constricting blood vessels - choking the same vessels that provide blood supply to the tissues being operated on. Cartilage and soft tissues can have prolonged healing or even die if they are jeopardized. This is the sa...