Beginning a few months ago, my heart was skipping beats once or twice a day. They are not premature contractions. They are absent. It was infrequent this way until about a week ago. For a week, the dropped beats are nearly every 3 or 4th beat and time I'm not sitting completely still. When I cough or bend over the arrhythmia presents every time. Could this be due to hormonal changes (I am 29)?