Pardon me while I weep

Partly from joy, partly from sadness.
We're through buying diapers. My baby is no longer a baby.
That's right folks, Brynna Belle has finally decided to potty train. After flirting with it for months, on Monday, she just decided she was ready! I didn't have to ask her if she needed to potty at all, she would just tell me. It has been 5 days, and she's only had a small handful of accidents, most of which were my fault. She is still in a pull up when she's sleeping. But tonight, after putting her to bed, she got up and went potty all by herself. She started crying when she couldn't get her diaper back on, or I might have never known.
I'm so proud of her, and she's so proud of herself. She wants to call Daddy every time, and when I say no, she says Aunt Cadye? DeeDee? Nana? She just wants to let someone know!
It does make me more than a little sad. She is growing and changing so much these last few months. She talks all the time, though only at home, and her vocabulary has just exploded. Being potty trained is just the final little push into big kid-ness. It's pretty bittersweet.