Aiyooo, don't worry too much lah, choroid plexus cysts are super common in detail scans and biasanya resolve on their own by third trimester, most mums I know went through this juga! The thing is, soft markers like this alone don't mean anything is wrong, but since you're worried (and rightly so, we all are first time!) definitely follow up with your doctor or maternal fetal medicine specialist to discuss, because they can look at the full picture and maybe do another scan later to confirm it's resolving, that will give you peace of mind much better than Google! Sending you calm vibes, mama, you're doing the right thing by being informed.