I think my daughter is stressing too much

As parents, it's hard not to have "freak out" moments when our children are being bullied, stressed, or exhibit other symptoms of teenage angst. We walk a delicate balance of letting go and giving autonomy to our teens get older. Adolescents are learning how to be functional adults and it's important to allow them to try (and sometimes fail) in managing their emotions. Grades are a pretty good indicator of how a student is doing, overall. If your daughter has a 4.0 and there's no pattern of "crying and freaking out" I'd offer gentle support and encourage her to find ways to relax when she's stressed. If her grades start to decline and her crying spells become more frequent, a call to a counselor who specializes in teens might be in order. Good luck!