This is the exact thing I keep trying hack out of my sinus every other day! But I’m having some pain in my chest not sure if I pulled a muscle trying to hack it up or something more serious. I didn’t realize how difficult it is to breathe until I went to get vaccinated and had to do some walking after a year of quarantine and taking care of everyone else, I now realize that I haven’t been getting any exercise and gained weight and I’m so out of shape so now I’m like is it hard to breath because I’m out of shape or because something very serious is happening????? So Worried here!!!!