Baby Bump size

​I'm 21 weeks pregnant and was just wondering about everyone's baby bump! 
​I was a small very active build before I became pregnant and even now my friends and family keep commenting on how my belly just looks like I've eaten a big meal! 
​I've even had one comment that my baby will be a midget if it doesn't grow soon. I'm quite an easy going person and I can shrug things off easily but now I'm a little bit worried. I will double check with my midwife on the next appointment but I was curious to see the comments people say to you and how you all react! I can feel my baby kicking so I know it's ok and I think my belly will do more growing from the second part of the second trimester! I feel like I've grown so much already! Maybe they didn't realise how tiny I was before!