Maybe she starts moving around like crazy because she wants you to put your shirt back down. I don't understand what it is exactly you can't wear... If it's tight clothing that squeezes your tummy, you can roll the full panel band down. You shouldn't need the whole thing at 20 weeks anyway. If you just don't like pants, but maxi dresses and skirts. They sell them in maternity with room for your belly, but they aren't clingy.