Jennica stayed at Cameron's house until pretty late because they were having too much fun talking. He really loved the meal she prepared, which boosted her ego a bit.
Unfortunately, staying there so long meant she didn't have very much time to pack. Ohio was colder than New York so she had to pack heavy if she didn't want to freeze to death and they were supposed to be at the airport by 8 AM.
Going into such a hectic trip wasn't going to be much fun while running on little sleep. She couldn't get her brain to turn off either, worrying about how things would go. If Cameron decided he didn't like her anymore because her family was too crazy, she would just about die.
Not knowing what was going to be in store was stressing her out. What exactly did he plan to do as her fake boyfriend to convince her mother to lay off?