Possible heart problem on ultrasound ☹️

So had a growth scan at 33wks and they said everything looked fine except one chamber of the heart looked bigger than the others. The Dr said it might be because been was stubborn and want moving much. He said normally if there's an issue with the hard they will catch it at the 20wk scan. He said there's probably nothing to worry about but he was going to send the pictures to a specialist to look at just to be safe. I want worried until a got a call from Duke OBGYN in Raleigh over and hour away from me. They set up an appointment with a specialist to do another ultrasound. So now I'm worried because it's Duke. You usually don't get referred up there if it's not something to worry about or unless you just live up in that area. I can't even go to the appointment yet. I only have VA for insurance since I'm a veteran and the VA had to approve and send a referral not my OB and it's very difficult to even get them on the phone. So I'm basically stressing even more because I know this isn't going to get looked at anytime soon. Has anyone had issues with their baby and the heart?