Why is meg so upset in chapter5?

In Chapter 5 of "A Wrinkle in Time," Meg Murry is upset due to her feelings of inadequacy and isolation at school, where she struggles with her self-esteem and feels different from her peers. Additionally, she is worried about her father’s disappearance and the impact it has on her family. This emotional turmoil is compounded by her frustration over her own abilities and her longing for acceptance. Overall, Meg's feelings reflect her inner conflict and the challenges she faces in both her personal and familial life.