My chest is aching from last few days. The position of pain is upper- left portion which is just 1 or 1.5 inch from center of chest. Bt I doesn't feel discomfort till then I am not doing some activity (like when I try to lie down, sitting up, or may stretch my body a bit up. Pain also appears when I try to inhale or exhale air deeply. please suggest possible reason and medicine. My ecg report is normal.