June 19-13, this 86 yr. old female had open heart surgery(replaced aortic valve, repaired mitral valve, double bypass, Ablation and tumor removed rt mid. Lung, three days ago low grade fever, tight chest with dry hacking cough wheezing, next day seen by urgent care, M.D. Swab for flu negative, given levaquin and tessalon pearls, fluids etc. deep persistent cough persists. Any recommendations.