20 week scan soft markers

Hello, I'm new to this group I hope I can find someone I can relate to and talk to, to find some relief and support. I just had my 20 week scan done and I was told they found small cysts on the baby's brain and spots on the heart. I was told this isn't very uncommon and most of the time it goes away, but there's always that chance it doesn't. So we tested for Down syndrome. I am so worried I have had two perfect pregnancies prior how could this one go so wrong? 😞 I'm just concerned and need to find someone to talk to who has experienced this as well.