am I not gaining enough?!

B • • Angel baby 2014 • Little man born 2015 • Angel baby 2016 •Rainbow baby b/g TWINS 2017 • Girl 2019 👼🏼👼🏼🌈
I am almost 24 weeks with boy girl twins and I have only gained 11 lbs and I'm worried that it's not enough. I'm not sure how much I gained by now with my son but I'm sure it was more. I gained 30lbs with him and he was 10 of it. My bellys big and they were measuring perfect it just seems strange that the scale isn't reflecting that. What's everyone else gaining by 24 weeks. Everything I've read saying should have gained like 20 lbs by now 😳Sorry for the weird pics it's the most recent belly pic I have