My first ultrasoundlast week was 6 weeks 1 day babys heartwas 141 today a week.later baby was 7weeks 1 day and heart rate 133. Iv never had one be so high and drop so soon. My doctor said its normal that baby might have been moving last ultrasoundto give a higher rateing but being so small we cant make out the movement. Im trying to be cool about it being they didnnt see concerns but its just weird to me.