See! :/ I can't tell!

See! There's not a big difference between 7weeks and me now at 18 almost 19 weeks. Which my ob always says I'm a day or two ahead of this app. :/ Just worried about the baby growing. I can't feel anything and can't feel my uterus. I'm a big girl. 230lbs. But still, just worried my baby isn't growing right. I go Wednesday for a gender scan. Just praying everything is okay! Excuse me holding my boobs up rofl.