Midwife says she thinks it's a girl

Phillippa
So I don't have my next scan till the 4th of July which is when I'll find out the gender, but I had my midwife appointment this week and we were listening to the baby's heart beat and she said she thinks it's a girl. This was right after she said it was 152bpm do girls have a higher heart rate or is she just guessing? I really want a girl 😊😊