Just have that feeling.

Linzy
Have any of you just had that feeling that you absolutely know what your having before you actually find out the sex of your baby? 
I feel like I just know I'm having a boy. 
Not that I'd be unhappy either way, I'd actually really enjoy having a girl ( we already have 1 boy) but I just don't even think about it being a girl. 
It's such a strong feeling that I don't even second guess myself which it TOTALLY unlike me. I second guess everything! But not this, I've never been so sure! 
We're not finding out the sex until our 20 weeks ultrasound but I'm almost ready to start completely planning for a boy. 
I guess my question for you ladies is..... Have any of you just knew what you were having and were right?