Currently 13 weeks due date 10/7/19

My boyfriend and I are both hoping for a girl when I got my first ultrasound my baby was in the fetal position but it’s heartbeat was 155bpm

So when I got my second ultrasound/NT scan my baby was moving and kicking around like crazy and the heartbeat was 165bpm me and my unfortunately I won’t know the sex of the baby till 5/24 😩my boyfriend and I already have boys ages 11,8, and 7 so a girl would be great even though I know a heartbeat doesn’t determine the sex what do you think 🤔