First tooth?

I think Jonathan might be working on his first tooth. It'd be a bit early for teeth, and the one that seems to be coming in isn't in the front like most first teeth are. But he's drooling quarts, and he's fussy all the time (or at least, it feels like all the time!) which is unusual. Jessica and I both think we can see/feel a little nubby spot in his gum. We'll see if a tooth erupts. :)