When I got my detailed ultrasound the technition told me there was a little light by her heart that showed up on the ultrasound, my doctor sayed it is an extra chromosome by her heart which can cause downsyndrome it can't cause heart problems but she said 4% of pregnancies have this and their babies come out fine. I got downsydrome tests and it came out negative but im still super worried and scared. Anyone else ever have this extra chromosome thing? ...