It's not very common for a boy to be mistaken for a girl, it's usually the other way around since girls can be swollen down there.

there's also a possibility of winning the lottery lol.

boys can be mistaken for girls since sometimes they're "small" or their penis hides. but once they say boy, and see the penis and not three lines then its a boy lol.

So there's a possibility the doctors are wrong right lolz @emily18234

two days before I had her, I had a dream I gave birth and the doctors all told me it was actually a boy even though the whole time we thought it was a girl. I thank God she came out a girl though hahah