Hi, I’m Jordan I’m 19 weeks pregnant today and just got back from my ultrasound, they said they saw…

Hi, I’m Jordan I’m 19 weeks pregnant today and just got back from my ultrasound, they said they saw a shadow on my baby girls heart, They said it can be a marker for downs but I took the blood tests earlier and it came out negative.. just really worried anyone else have this happen? They said not to worry