Hello ! I recently recovered from common cold and had sore throat as well. Yesterday I walked a few extra steps than I usually do everyday and I realized that I have problem in breathing. I could not and still I am not able to breathe properly. I am afraid what this must be. It could be because of the cough still congested or I want to make sure if it's not thyroid problem as it's been a while since I got it checked. Please advise.