Maternity clothing

Hey guys! Anyone have any tips or tricks for clothing that will hide baby bump longer during hot days? I am 16w but we are hoping to hide it until 21w and I’m starting to hit that phase were my belly is getting bigger and is a little more noticeable since this is my third baby. I don’t have a bump yet but I’ve gotten thicker around my belly area and harder so I know I will show a lot sooner this time around. Currently I have been doing dresses and of course sweaters when it’s been cold enough…. but sadly I think we are hitting the end of cold weather where I am and because of my job I need to think of some other ways that involve pants that will still look kinda professional while hiding my tummy a little more.