I was diagnosed with Barlow Syndrome (or Mitral Valve Prolapse) after I lost consciousness about a year ago. I have regular pain in my chest and shortness of breath, which increases severely when I get a shock (fright), stress and exercise. Sometimes, for no reason, I get sudden numbing pain in my chest and blackouts because of this. I also feel weak after such a episode for about 2 days. I am worried that I was misdiagnosed. Can anyone give me more insight?