Not Showing Yet

Tomorrow I’ll be 20 weeks pregnant with my first baby, but my belly isn’t showing much. I’m feeling a little bit down because people keep asking me everytime I meet them “so where’s the bump?” “omg your belly is soo small” “you’re 4 months pregnant? Really? Can’t see it!” My obgyn told me that it’s normal for first time mothers, but Im still wondering is it really normal? Is the baby growing well? I wish I could tell people to shut up 😞Anyone else experiencing the same?