Help! Which dress?

Okay, I need help from someone who doesn’t look like a complete frump during pregnancy. I live in leggings and my husbands tee shirts and have never really cared that much. Buttttt we have a formal wedding to attend in a couple of weeks (I’ve never been to one) and I have literally no clue how to look fancy - especially with a bump. These are the two dresses I have that kinda might work. Do either look presentable enough?

Any tips on looking elegant - or at least not like

trash when your pregnant would be VERY appreciated.