Thank you, parents & students!
D has read your posts (and chided me a little for my pms joke). She feels so much better knowing that she was not completely alone in experiencing a little BDD letdown. She really does understand that spending a few less-than-euphoric days on campus does not mean that Yale is not the right school for her.
Ironically, I think it has also helped that she is receiving those last minute calls from scholarship committees, department heads and coaches at other schools urging her to attend their institutions. The calls add some "noise," but they also provide assurance that she has several very good choices, and if she decides on Yale, it will be for solid reasons.
I think she is in the right frame of mind now to consider her options over the weekend, and I am confident she will make a good decision.
Thank you again, parents & students, for your honest & thoughtful replies.