Anyone swear they were having boy/girl and got opposite?

Samantha • Just a wife with an angel baby & a little girl! 7.31.18

I’ll be 18 weeks this Sunday and I don’t know the gender yet😫 But I have been swearing up and down that we are having a little boy, I just have a strong gut feeling.💙 Was wondering if this happened to anyone else and they were right or wrong??