Hello. Im a 18 year old boy ,very active, good weight. The past few weeks i have been having some chest discomfort and/or dmall pinching pain in chest ,usually when im sitting but even before sleep,so my body is at rest. Sometimes a sudden shortness of breath happens accompanied with a panic attack. I get the feeling of dying (panic attack). I did a chest x ray , ecg, ekg, blood tests, blood presuere test, stetoschope test. All turned out fine. So what is the problem? Angina?