In 8 days you'll probably have some capped brood. If the caps look like kix cereal, then you have laying workers. Otherwise, I would assume it's a new queen getting the hang of things. Look for other clues. Laying workers usually can't reach the bottom of the cell. Late mated queens can't either. Laying workers usually don't lay a good pattern, in other words, with laying workers the brood is spotty, one larvae here and one quite a ways away. Laying workers are fond of drone cells and will lay on top of pollen. They usually lay a LOT of eggs in a cell, not just two or three.
http://www.bushfarms.com/beesfallacies.htm#doubleeggshttp://www.bushfarms.com/beeslayingworkers.htm
