Boy or girl? There is a debate 🙄

We decided to elect to pay for an ultrasound at 15 weeks to find out the gender of our baby early. We have three girls so we were a bit disappointed when we found out it was another girl, but we’ve grown on the idea. It’s not too big a deal, but the anatomy scan is tomorrow and due to the potty shots, I’ve had multiple people tell me to ask for a second opinion at the anatomy scan. What does everyone think? Should I ask or does it look like a girl? I saw the lines and just kind of assumed it was correct.