Can thyroid problems cause chest tightness and shortness of breath? I've had CBC tests done all normal ekgs echocardiogram so I dunno what this is : (

Stress and panic. Exhaustion. Holding stress in your chest. Breathing too shallowly for too long. You find not have heart disease and you now have the tests to prove it. This is your body trying to get your attention. Something is wrong. What are you holding in or on to?