I've only heard of the microclot last week. I read on it and it makes sense. Now as your SOB is a real "SON" of uum,,,,I think you get what I am saying. Have you tried any nebulizer treatment? Plus, if you can find any.. you can take some Vicks or eucalyptus oil in a steam pot let it get good and steamy take from burner , with a towel over your head and breath. Also another one is just lemongrass. It will help loosen some mucus up so you can extract it. I have COPD and Asthma. When I was at that phase I was down a good 2 weeks and in a climate change. I had a really bad time and my mom who as been in the medical field my whole 48 years. Showed me how to do that. Plus, I use my defuser with a little bit in it next to where I am sitting and sleep. She swears by Neb treatment but me myself I like to do the natural remedies. Like sushi with wasabi or hot and sour soup with pickled Chinese cooking pepper or kimchi but unfortunately I'm no longer allowed to have kimchi. Because I am now in the gastro neur part my nervous system my digestive system my kidneys my eyes brain heart that kind of good stuff but I wish you all the best and I hope this is a little bit of help I know I'm not a physician but I just know what's helped me for 3 years