I had a pulmonary embolism in Nov. 2008 and was on Coumadin. I didn't tolerate it well. I was put on Plavix and ASA by my pulmonologist in Nov. of 2009. MY HEART WAS RACING AND MY CARDIOLOGIST PUT ME ON FLECAINIDE ACETATE 50 MG. 2X DAY. I just don't feel right. Could this combination be messing me up?