Hi there, thanks for asking. It is probably related to your anxiety
. Anxiety can provoke the sympathetic system and it cause heart to beat fast. However, it is useful to check your heart beat by your doctor and also to see if it is necessary to take an ECG. In some people anxiety can stimulate heart to beat irregular. Some people who have irregular heart beat experience more anxiety as well. So it is necessary to check by your doctor about this issue. I wish you a good health.