Renarrowing artery or heartburn?

I had angioplasty and a drug-coated stent inserted last April, after feeling sharp pain while hiking. I felt very good afterwards and resumed an exercise program. The last couple of weeks I am feeling an ache just below my sternum, and my breathing just seems a little short of 100%. No sharp pains as before, and I do get ocassional bouts of heartburn. I am going in for an EKG tomorrow, but could this be an indication of a renarrowing of my LED artery? I take crestor, effient (blood thinner) and a 325 mg aspirin every day, and have never missed a day. Two months ago my check-up revealed my total cholesterol count had declined from 230 to 120, and my doctor was satisfied. I told him about the ache and he suggested an acid reflux medication, which I have not done. It's worrisome to me.

[ed34]

There is always a chance it could be the effects of the aspirin. 325mg is a large amount? I've had 6 stents and have only ever required 75mg daily. A clue would be when your discomforts appear. Is it after eating, when relaxed, when exercising etc? A blockage forming and giving symptoms will surface when you increase the demand from your heart, not when you are relaxed.