Olga Hive Has No Eggs Or Larvae!!!!

Okay, any beekeepers with any kind of advice, I could use it now. Our Olga Hive that we overwintered and just divided about a week and a half ago appears to be in trouble. When we took away the box with brood for the divide, we left behind the box that had some fresh larvae in it. We just checked her today and there is absolutely no new brood, no larvae, no eggs. There is some sealed brood but it is all about to hatch. The hive has several workers, but is this a sign that the queen has died or can no longer produce eggs? Should I get a new queen for Olga?

Any advice appreciated, I'm now going to sequester myself into some bee books.