Spanx to hide a baby bump?

K
I'm getting married in 5 days & will be 16 weeks. 
My bump is showing & I'm so embarrassed. I just look fat. I was thinking of wearing 2 pairs of spanx to suck everything in. Will this work? Or do you have any suggestions? 
My husband to be also doesn't want anyone to know so I can't rock the new found fatness.