I am about 6 weeks along and I feel ok aside from the last week or 2 I've been experiencing palpitations in my chest.  They are not all the time but when I have them sometimes it makes me feel a bit anxious and I start to feel short of breath. Ghe dr did EKG and although there was an abnormal beat which I've always had she wasn't alarmed. She said that the extra blood volume could play a role in the palpitations due to the heart working harder to pump the extra blood. Has anyone else experienced this? It's kinda scary and annoying as well. If u have had, how long did you experience them?