I've figured out why Baby J was in such a bad mood this weekend. She's cut her first tooth! It's the bottom right incisor. I discovered this at the grocery store this evening, when she chomped down on my finger.
(I spent the entire weekend trying to convince my friend's husband that Baby J really isn't like this all the time. And that it doesn't mean his sweet, placid newborn is going to turn into a shrieking harpy in six months.)