Chick, this was mentioned in another forum too. I don't think you're losing your mind.

I wish I could give you something concrete to do for your daughter that would change her mind immediately. I can't imagine how upset you must be. For her to ahve worked so hard and then turn her back on it is so sad. Is this for swimming? Has the coach called her? Sometimes it takes someone other than the parent to get through. I'm praying she has a change of heart. I'm also praying you can accept her final decision.