Sizing for a Bridesmaid Dress

I have a wedding in May and I’m struggling on what size to order for my bridesmaid dress. I’ll be 26 weeks pregnant with my first and the dress has minimal stretch. I’m usually a 4 and I’m not showing now but I’m only 13 weeks. Please help!

I have a wedding in May and I’m struggling on what size to order for my bridesmaid dress. I’ll be 26 weeks pregnant with my first and the dress has minimal stretch. I’m usually a 4 and I’m not showing now but I’m only 13 weeks. Please help!