During the weekend that she'd spent with Peter, Lucy had done very little serious thinking. She had mostly just been focused on consuming more screen time than was advisable. Lounging all over Peter's apartment and eating... healthy stuff of course. Then there had also been that extra touch time that she and Peter had indulged in.
In short, she had not really let herself worry about anything while with him. Just letting herself enjoy those few stress-free hours, not letting anything bother her. While that had been great, the problem was that Lucy was one of those people who worried a lot. Especially when she was getting into a situation that she did not know anything about.
