so scared, opinions please

So after theee wonderful boys (7,4,&2) we have been told baby is a girl,from the very beginning I have to say my husband swore it was a girl, me on the other hand thought it was a boy they told me at 16w3d and now I'm hearing all of these stories about girls turning into boys and I'm just starting to freak out not because I wouldn't live another boy , but just because I feel like the gender disappointment would be worse after being told baby was a girl so here's my sono just wondering what your opinions were! Sono tech said she was 95% sure it's a girl