When stressed,my chest feels a little heavy and while walking it pains a little along with heavines,no shortness of breath.pain goes away after i stop walking.can it be panic attack or is anything serious?ithappens only on days when there is tension?

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!

I think I answered this question previously. Your description of relationship with activity and relief with rest suggests cardiac ischemia. However, because of your young age, congenital coronary artery abnormalities should be considered if the ECG during pain shows ischemia. If ischemia is suggested by ECG, echo or other imaging studies are needed to confirm anomalous origin or course of coronari