20 week ultrasound

Had my 20 week ultrasound today and doctors told me there was a tiny spot in the left ventricle of the heart (echogenic focus) and the baby has a left choroid plexus cyst. She didn't seem very concerned but she went over everything so fast. I am worried, has anyone had experience with this? From what I've read, it can sometimes resolve itself. I am a first time Mom and waiting for another in depth ultrasound in a few weeks after I get the referral. Thank you!