20 week scan

Today I had my 20 week anatomy scan and I’m freaking out :( baby has a choroid plexus cyst, and bright spot on her heart. My doctor isn’t too concerned about it, being that my genetic testing was negative for any abnormalities. Doctor also mentioned that their isn’t anything physical with her features that would indicate Down syndrome. Just wondering if this has happened to anyone ? Did the cyst go away? Should I be worried even if the doctor isn’t ? Help :((