The other answer above is the best. There's no over-the-counter medication for that sort of discomfort, and even if there was, it's not the sort of thing you want to treat yourself. It requires a professional to examine you and give you guidance on what to do and possibly prescription medication to help you along. Heart irrugularities are not the sort of thing you want to put further down on the list of things to do. You should consider elevating it to a higher priority, for your good and that of your family.