HELP! Engagement picture outfit!

Alright ladies I have my engagement pictures in a few weeks and I have no idea what to wear. I’m not a small girl and have always been self conscious. We’d like to match the theme for our wedding because we’re putting a picture on the invitation. Our wedding is going to be shabby chic with navy and a dusty pink for our colors. Any suggestions? (These are pictures a friend took of us for an assignment before we were engaged... just a reference for body type)