They found the same thing on my baby's heart at 18w4d. By the time I went to the fetal specialist at 22w4d, it was gone. I cried and worried myself sick over it and I wish I wouldn't have. I'm sure everything will be fine with your baby too!! More often than not, the spots will go away on its own.
Try not to worry, most babies with EIF come out perfectly healthy and fine (: Have you been tested for DS?
They had to do the DS test again