At your age, the symptoms which you have explained, doesn’t seems to be like Cardiac issue. But as you explain your lifestyle, which is very unusual and this can lead to the gastric problems and indigestion. Sometime this palpitation and chest heaviness maybe because of the anxiety also, but on the safer side, you have to evaluate yourself for Cardiac things like ECG Echo and regular blood test.
Next Steps
Cardiac evaluation and routine test
Health Tips
Lifestyle changes and healthy diet.