Uncomfortable even after stent in heart.

Hi, I am 37 years old. I am vegeterian, never smoked , no alcohol but got heart attack on Nov 20th and then hospitalised in the hospital. It's found that there are blockeges in my heart artery. They put stent in one blockege. For others blockeges they said it will be control by medication. It's just been 3 weeks since stent in put but I still feel heaviness , tightness in my chest. Also having feeling that something is moving and pinching sometimes around chest and heart area. This is very uncomfortable for me. I am not able to focus on something. Can you pls help me on this. Is this normal post stent surgery or what can be issues? Are there more blockeges that is causing this? Or I have to live up with these issues? Pls suggest me what  should I do. I am currently in Canada.