question: Iam 30 weeks pregnant & Yesterday at an appointment with my widwife, they detected he had irregular heartbeat ( was kind of hiccuping or missing a couple of beats) up until this point everything has been fine. I was rushed to an ultrasound to have a closer look at the heart & they could not detect anything wrong. Heart rate was 160 and not skipping. I have to go back again next week but am really worried! should i be?? and could smoking one ciggarette a day be causing this?? or anything i am doing??