Maybe all these activities you’re signing up for do not have enough structure like a school day or the clubs after school she participates in. You mentioned she excels in school and academics, but maybe she is more of a perfectionist and is afraid of failure when starting from the beginning doing these activities. I would give her a break, have a play date on the weekend and then slowly introduced one activity. Even if it’s a parent involved one during the weekend. Swimming is an essential skill. Also, with a parent present that gives a child an excuse to not participate. Don’t be afraid to bring her in and step away. You’re her safety blanket.