I am getting these stinging feelings in the left part of my chest. happens few times a day and makes it hurt to breathe. But after 5 seconds goes away Any suggestions on what this might be?

It's important to seek medical advice if you're experiencing chest pain, as it could be an indicator of a serious underlying condition such as heart disease, pulmonary embolism, anxiety, gastroesophageal reflux, precordial catch syndrome, pericarditis or any musculo-skeletal issues and you should consult a professional for an accurate diagnosis. Self-diagnosis can be risky.