It is really sad that you are suffering angina again so soon after stent angioplasty. We do get some such patients who develop problems soon after stenting. With modern stents it is less common than before but it remains a persistent problem. scientific trial results often show better results than what we see in real life clinical practice.
But most importantly I accept that we have to improve your condition. I suggest that you should get the complete picture of you as a whole person: control of diabetes, hypertension, smoking, cholesterol, regular exercise, yoga and meditation. Continue with the prescribed medication. Since your symptoms are same as before stenting it is logical to suspect stents narrowing. This must proven or disproven by coronary angiography. We can come to a reasonable plan of action only after a coronary angiography. We might find evidence of stent failure or progression of disease in non-stented vessels can be the culprit.