I recently went for a chest X-ray and PFT test because I've been having some mild breathing issues. The ECG and echo came back normal, which is a relief. However, I did have COVID about 45 weeks ago, but it was pretty mild, just a 3-day fever and cold symptoms. I took all the necessary meds as prescribed after consulting a doctor. Should I still be concerned about these breathing issues, or is it likely just leftover effects from COVID even after so long?