not showing pregnancy

It's fine. Since this is your first pregnancy, your skin is tight and wouldn't stretch so easily so early. When I was pregnant the first time round, no one knew I was pregnant until the 39th week. Everyone assumed I was just gradually putting on weight. My daughter popped out a hethy 3.4kg baby naturally. Ignore what others are saying. As long as the little one is baking healthly inside you, there shouldn't be anything for you to worry.