Bridesmaids dress shopping while pregnant

Rachel

My best friend is getting married June 2021 but wants to order the bridesmaids dresses in a October 2020, problem is I’ll be about to burst pregnant as I’m due early November 2020. I got down to 150lbs (size 8 pants/small dress) before I got pregnant and I’m now in the 180’s and a medium dress). What size should I order my dress? I’m thinking a bit bigger cuz it’ll be earlier to tailor down than to add fabric. Thankfully the dresses she likes are more forgiving/flowy rather than body hugging. Anyone else had this dilemma?