I find some doctors don’t listen to women. I’d been tired for seven years assuming it was c-ptsd and Teaching. Quit that at 61 and thought it was asthma as I was no longer working. Went for a walk and only got fifty metres. Within a week diagnosed with dilated cardiomyopathy by my new female doctor. I’d been stressed at work sure, but it was also my heart. Probably a virus in 2007 ( when the down turn happened). I know it’s easier to do this in Australia but regular ecg's are important in the presence of breathlessness.