Hermione was nervous to enter Number Twelve at the end of the day. She missed a day as she stayed asleep in bed. While it was theoretically safe to be left alone for a day or so, she didn't like to risk it. The end was so close! If she managed to ruin the potion after working on it for so long, she wasn't sure that she would have the opportunity to get the ingredients again. Nor was she certain she'd have the patience.