I had covid in the month of April and since then I have sometimes felt like I am having breathing issues, resting heart beat goes to around 90 which usually revolves around 75. My oxygen levels never dropped below 98. But, still I feel shortness of breathe at times with uneasiness. It specially occurs when I listen to very negative news but I happens without that at times as well. My blood pressure is around 110/70. I did my ECG(attached) after my negative test and a couple of doctors told me it has changes in it. I am really afraid. What will I do? I used to be really fit, played football and went to the gym occasionally as well. Right now, I can't enjoy physical activity without fearing a lot.