PLEASE HELP!😔

ok so this is going to be a long but good storyy. i currently have 3 girls & was pregnant with twins but found out at 16 weeks that my baby's heartbeat had stopped beating the other one was a "girl" but they couldn't really tell because of her position and the one that passed was a boy. So they did blood work just to check (the baby that is still alive) had no abnormalities and did chromosome check. i got a call from them today and they told me that the baby is normal and asked if i wanted to know the gender soni said yes...the girl says "your baby is a boy"...wait what?!!! they've already told me twice that its a girl. once when i was 10 weeks and the time that i was 16 weeks they told me she looks like a girl...has this ever happened to any of you? they sent out my blood work again to check the gender of both babies and hopefully by friday i get my answer. the thing that sucks is ive already started buying baby girl clothes😔😂😂