I remembered Maria's comment last night while Sean and I were making dinner and out of curiosity, we went hunting to see if there might actually be a tooth. And lo and behold, there is!!! One snuck by us. The tiniest sliver of a little tooth has broken through on the bottom left. Sean and I were so excited that we were dancing around the kitchen-- Hadley thought this was incredibly funny.
Interestingly, Hadley hasn't even seemed to be teething this time. She has not been overly cranky or overly drooly and has not been eating or sleeping any differently than normal. It's like this tooth has not yet affected her one bit. I'm surprised, to say the least. Let's hope the remainder of her teething goes this smoothly. I'm positive I will live to regret that statement.