Echogenic focus

Just had a follow-up ultrasound (23 weeks 5 days) to find some things our over active baby wouldn't stay still long enough to see last time and now the Dr says there is an echo genic focus in her heart which is a soft marker for down syndrome. She said there were no other markers and everything else looks good but she is sending us to get more testing done. This will be our first baby and after having already gone through a miscarriage I am supper worried that something could possibly be wrong with our baby. I just turned 30 and my husband is 32, neither of us have family history of anything.