27 weeks & gained 21

I feel like I have gained a normal amount of weight - 21 lbs in 27 weeks. People keep saying things like omg you're so small and I can't believe your almost 7 months. I'm tall and have only gained in my belly. I'm not looking to brag just want to hear from others who are gaining at a healthy rate? I feel my little boy being active all day and I eat plenty.