Aggravated Momma!!

Is it just me, or does it aggravate anyone else when people assume the gender of your unborn baby. Even go as far as calling it the name you have picked out for that gender. My boyfriend's family swears the baby is a boy. I'm only 14 weeks so I won't know for another month but it aggravates me sooo bad when they say it's a boy and call the baby by the boy name we have picked out. My boyfriend even does it! This is his first and my fourth. I have 2 girls and 1 boy and I'm 99.999999% sure this baby is a girl. I'm even scared they won't accept it or love it as much if it is a girl. I've always been right about the gender with all of my pregnancies but his whole family swears it's a boy!