I Had A Stent Put In November This Year. I

I had a stent put in November this year. I have been prescribed Brilinta 90 mg twice a day. I continue to have shortness of breath. For the past two weeks I am beginning to feel pressure in my chest and whole body aches. Feeling fatigue constantly. I have read about side effect of brilinta and I am not sure if it's brilinta or stent failure. What should I do. When I spoke to my doctor it was only shortness of breath and he said give the med a chance, normally SOB subsides. Now I am feeling horrible with aches, fatigue and SOB. Could it be stent failure, or side effects? Any test that would show stent failure????