I had what felt and looked like a very vigorous heartbeat in my right breast, it was very strong and quite alarming to see. this was when i had just led down in bed. if it had been my left side i would have thought palpitations, however it was very strong

Palpitations: If you are experiencing palpitations that are noticeable and this is a new symptoms, it would be beneficial to see your primary care physician and to get a baseline workup if you haven't already. This is especially true if the palpitations are associated with other symptoms such as chest pain, lightheadedness or shortness of breath or if you have existing heart conditions.