I want someone advice if I should get 2 ultrasound.

I am excited I really do, but I couldn’t believe it when the ultrasound technician told me I was having a girl (Im 20wks). Im scared that when Baby is born turns out to be a boy. Don’t get me wrong I love my baby no matter the gender. But this is what make it hard to believe it’s a girl. I have 2 boys, my older sister has 3 boys and my older Brother has 2 boy and one of my brother’s son has a boy. And on my Husband side its only him and his brother. I ask my Husband I want to go get another ultrasound to confirm gender (he thinks is only in my head). What do you think?