Have this pinching / knot feeling upper left chest for over week and half more w movement shoul worried? it's not a rumor is it? how does that feel ?

?Musculoskeletal but: ...while no one symptom definitively indicates a heart attack, many people make the fatal mistake of waiting out atypical heart pain. "Heart pain" is often indistinguishable from esophageal, pericardial, mediastinal, gastric, chest wall distress, and yes even tumors. Easy to test for--see your doc.

Rib cage: If the discomfort is sharp, fleeting and brought on by a deep breath, cough or other chest cage movements it often is a pinched intercostal nerve or muscle that runs between 2 ribs. This has nothing to do with the heart, lungs or a tumor and usually resolves on its own. Avoid straining of the rib cage for a while. If symptoms persist, see a physician for evaluation.