Left Ventricle?

[Yankee71]

Hi..had an echocardiogram yesterday and the radiologist is referring me to the cardeologist because she said she can't tell if my left ventricle is operating at optimal capacity...right away I'm spooked by this...since lockdown in 2020 I've gone from 4-5 days of 45 mins on the treadmill and moderate resistance training to a sedentary life in front of the television. After 4 vaccinations I finally came down with covid, thought I recovered, only to develop breathlessness about a month afterwards and I've been on a downward spiral since..I'm 71 and never been sick a day in my life, now since covid I can't sleep more than 4 hours a night, fall asleep in my chair every day about 3 anxiety is setting in, and now this. Anyone else gone through this or experiencing it now?...Thanks for listening...