Jealous of bestie.

Bit of background - my best friend is pregnant. And I think I may have a tad of the green-eyed monster in. My partner & I are trying, and we have the goal of simultaneous pregnancy with said friend, as this will be my last (already have 3yo girl). I'm over the moon happy for her and her boyfriend -  don't get me wrong there - but I am a tad jealous. 
Is that wrong of me?