People telling me I'm too small...

Megan • Momma of 1 baby world side, 1 baby heaven side, and 1 more on the way
I posted this picture last week announcing my pregnancy (it was taken at 20 weeks) and I keep getting so many comments about how small I am and it's really starting to get to me. I honestly thought I was a little big for as far along as I am. Your guys' opinions?