Heartbeat Wives Tales?!!

So, my first born was always high and was a girl. My gut even said a girl. Second baby, I swore was a boy because the heart rate was always 140-150 and ended up being a beautiful baby girl. Pregnant with number three heart rate is 178-180 both times. My best friend is pregnant with her first boy and his heart rate has been as high as my third one. I don’t know why I get so angry when people are like “oh, yeah...you’re having a _____.” Just did blood work today, so we’ll find out soon.