Fluid Around Heart

Hi all - I had my genetic screening done today at 12 weeks 5 days. The doctors were alarmed to find fluid around the babies heart. Right after the ultrasound I had a Chorionic villus sampling (CVS) to rule out Down syndrome and any other possibilities. They were more concerned to find this fluid in the first trimester. Other than this, the actual heart and all body parts and everything looked great! The neck fluid looked nice and thin as well. I'm curious if anything he has experienced this would a good outcome? The doctors didn't seem very positive or have much positive to say. So nervous 😩