Yeah I have been experiencing this too and I don't know what it is but it freaks me out! I heard anemia can cause an irregular heartbeat so I've been making sure to take my prenatals with iron in them every day
The doctor even says my iron is great I don't know what a heart murmur is but the doctor said I have it .. is that bad?
Sometimes it can happen in pregnancy because of all the extra blood your heart has to pump through your body. Your blood volume can increase by up to 50% during pregnancy! That's a lot of extra work. I had palpitations during pregnancy but it all went away after baby was born. No problems.