Hello Doctor, While lying in bed with my laptop on my chest my heart started beating too hard. (I m 28, female, physically fit, but have experienced these palpitations randomly since i was 13.) How can I calm it down? I ve removed the laptop and am lowering my caffeine and sugar intake, it seems like it starts beating too hard after I ingest these substances. I think I should get tested for arrhythmia and hyperthyroidism . I m looking for alternative routes to having to take drugs on a daily basis for the rest of my life. Thank you! M.