I am having continuously pain in my chest, whenever did extra physical work. after an hour or 2 hour feeling normal. checked blood pressure its normal?

May be serious!: There are many concerns when it comes to chest pain - can be associated with heart, lungs, GI tract (stomach/esophagus) or muscles/bones. There are risk factors for heart disease including high blood pressure, diabetes, family hx and smoking. When you have chest pain while being active- this is more concerning for heart. If you are still having pain i recommend you seek care immediately.

CP: If you have pain on exertion first thing that needs to be ruled out is the heart. So see your doc asap.