Umbridge took up your comfort item and now you were sitting in potions fidgeting quietly trying so hard to pay attention but failing to

Snape had a soft spot for them and made sure that they had access to the things they needed, headphones, quiet time when they get overwhelmed, etc.

He noticed them fidgeting and realized they didn't have their comfort item with them so he brought them to his office and asked where it was making sure to keep his tone soft