Hello, I Went To The ER In May For An

Hello, I went to the ER in May for an unrelated problem (turns out I am allergic to bell peppers). Anyway while there, due to my age (69) and family history, I was admitted for tests. The angiogram showed an 80% blockage to the right artery. I had a coronary stent placement. I have been fine, however this past week I have been having a dull ache deep inside almost to the right of my left breast. It is intermittent, sometimes feeling like a bubble popping, but with a dull pain. I feel like I have indegestion all the time. Should I be concerned?