I am 37 years old, and 4 1/2 months pregnant with my 5th child. I am in good shape, have had no pregnancy complications in the past (even w/ a twin pregnancy). However with this pregnancy I have been experiencing what I feel are heart palpitations and/or skipped beats. I am mildly anxious, but not on any medications what so ever. I have seen my general practitioner after my first sensation, and he pretty much said, he didnt see anything to worry about. If it happened again maybe they'd give a 24 hour monitor. The thing w/ that is, I don't feel these everyday, I can sometimes go a week feeling nothing, then a morning like this I felt them probably 4 times. I have read it sometimes can be gas sensations but when I felt it coming on, I checked my pulse and sure enough, I missed a beat. I did have a EKG when I was in my early 20's b/c a nurse picked up what she thought was a murmur, it turned out to be nothing. Should I be overly concerned??