It started with a sinus infection in mid June -- got antibiodics which played havec with my stomach, etc. but finall got over it around the first of August, Then near the middle of September again began coughing, sore throat, etc and not feeling well -- went on for a few weeks --- now I have an awareness of my breathing, flushed feeling, all stuffed up, slight cough, chest hurst when pressed, and just a feeling of exhaustion when ever I do even the slightest activity. I had an echo and stress test 1 1/2 years ago which came back fine. Do you think this is heart related -- or due to my respiratory system symptoms. Thank you so much