I'm feeling this heaviness on the left side of my chest and it's getting hard to breathe deeply. I've also got pain shooting down my left arm and into the upper left part of my back. I've already gone through tests like ECG, echo, and TMT, plus a chest X-ray, but everything came back normal. I'm really not sure what my next steps should be. Any idea what could be going on?

Despite normal ECG, echo, TMT, and chest X-ray reports, your persistent symptoms of heaviness in the left side of the chest, shortness of breath, left arm pain, and upper back pain warrant further evaluation; consider consulting a cardiologist