I’m worried because it’s getting made for my measurements and they did the waist at 26 inches... Like what if I gain weight or something... My wedding is in March!

*Edit* I’ve always been really small my whole life and I’m 5’,2” And I weigh around 95 pounds! I lost a bunch of weight due to stomach issues and having surgery on it but like I want to gain weight cause I feel unhealthy and unhappy with my low weight.