due for AF on 1/16

Mariah • Lucky momma to three beautiful babies ! Engaged to the love of my life 💕 things can`t get any better!
And it still hasn't come ! I've taken multiple test and all came back negative. Is it possible I'm just not producing enough hgc ?! Or could there be something else wrong ? Do you think I should call my doctor ? I'm spot on every month so this is nerve racking