Twin Baby Bump at 19 weeks?

I'm a bridesmaid in a wedding on August 15 and I'll be 19 weeks then. I bought my bridesmaids dress before I knew I was having twins. I only ordered a size up because I knew I was pregnant then. Now I'm worried because my belly is growing so fast! I'm only 10 weeks and wearing oversized shirts and maternity because I'm feeling HUGE. Can you ladies show me how big you are/were at 19 weeks so I can gauge whether I'll be able to fit in my dress then?! thank you!