Gender disappointment 💔

Well according to my doctor I’m 13 weeks and a couple days and during the ultrasound he told me that baby was a boy...I feel so heartbroken because I prayed so hard for a little girl...my sister is all excited picking out names and stuff and I’m trying to put on a smiley face and be happy but deep down it hurts

What exactly is this anyway? I was to broken to even ask him