When I was born I was diagnosed with a heart murmur (1/6). And as i've grown older it hasn't done much and my doctors say I'm good. When running one day I got a shortness of breath and I had to stop running. I also have anxiety so reading up on information about Heart murmurs and asthma I have become paranoid about it. Is that asthma or something linked to the Heart murmur? I am scared to sleep because of it.