I have pretty much allways been able to feel my heart beating when i lay down and things are still and quiet. But I thought it was normal.
This happened to me in my first pregnancy. My Dr had me get an echocardiogram (ultrasound of the heart) to check my heart, didn't have any strutural issues. I then went and had a ekg done and got a monitor i wore for 3 days. They determined my irregular beats were a normal kind of anomaly. I then had my thyroid levels tested (as irregular heartbeat is a symptom of thyroid issues). My thyroid levels were low, i went on meds and it got better. After i delivered i was able to go off the meds. I'm pregnant again and the weird heartbeats came back...back on meds!
I read that it could be because of extra blood being pregnant. Its not every day. Usually after I eat... humm maybe it's certain foods like ones high in sugar?