19 week ultra sound made me sad

Carla
Hi everyone, this is my first time posting. I am just sad and wanted to see if any of you have gone through this. I had my 19 week ultra sound today. Dr said baby has 4.5 mm of "bubbles" in her kidneys and a tiny hole in her heart. Dr said in most cases this goes away by end of second trimester or third trimester. I did have the blood work done a while back and it came back negative for down syndrome and no concerns. Has anyone heard of this or experienced it? I was Soooo excited to finally see my baby then this news has got me down. I'm trying not to stress out but I can't help feeling sad.