Hello and welcome to the forum. Thank you for your question. Here is an article that gives a long list of reasons that someone may have shortness of breath. https://www.mayoclinic.org/symptoms/shortness-of-breath/basics/causes/sym-20050890 We are glad you are working with your doctor. That means they are determining what is causing it. In light of covid19 going on, we are glad you ruled that illness out. Scarring can cause shortness of breath as it acts as an obstruction. This article discusses lung scarring specifically. https://www.medicalnewstoday.com/articles/319807 While scarring is permanent, light scarring usually has minimal symptoms as the lungs are resilient. It would be unlikely that 'minor scarring' would result in the shortness of breath you suffer but your doctor will hopefully have answers with you. Have you been ill?