Early gender ultrasound at 15 weeks 5 days

So I’m so excited but sooo skeptical that they may not be right only because this is my third child and my boyfriends third child and we have all boys one is a step child. So we were told today that it’s a GIRL!!! and I’m still freaking out and don’t know wether it’s okay to be excited or to not get my hopes up. It took the woman awhile to get the baby to cooperate and open up its legs. I want to see what you guys think and see if you think it may actually be a girl and if it’s okay for me to start getting all giggly and excited lol. Thanks lady’s.