Hello welcome to HCM. Since you have got yourself evaluated by an angiography and your doctor has cleared you from the heart side, means that the stent is working well. Angina can be caused by microvasuclar ischemia, which means the smallest vessels of the heart arteries are having blocks. These blocks cannot be seen by angiography nor can be stented. The treatment for micro vascular ischemia is antianginals, statins and anti platelets. You need not worry because it won t cause you any health issues. Other causes if chest pain here should be excluded. Like hyperacidity can mimic chest pain of cardiac origin. Please take a course of antacids for 14 days and see if your pain abates. Another cause can be costochondritis which is inflammation of the rib cartilage. This cinflammation can be contained by using anti inflammatory medications like diclofenac and ibuprofen. Next VitD levels should be checked. Bit D deficiency can also cause rib pain, bone pain fatigue. Please check your Vit D levels and take correction for vit D of they are low. You have a low probability of this pain originating from cardiac causes. So please continue taking tour cardiac medications and along with it take antacids, diclofenac and Vit D correction as adviced. Wishing you good health. Regards