It may eventually help with breathlessness. If that is an issue and the saline doesn't help, you may want to ask your provider for either a "rescue inhaler" similar to albuterol to try, or a nebuliser solution of albuterol (the preferred solution for long-term use.) My daily personal assessment of breathing situation determines whether I start with levalbuterol, followed by saline, or just do the saline.
Sue