I have a 21 week old barred rocked. She layed two eggs in three days and hasn't layed since then and its been about three days now. Shes gone in and outn of the egg box multiple times but hasn't layed. Shes still eating and drinking and doesn't seem to be sick. What should I do? Could her egg be stuck!? Please help these are my first chickens and I dont know if I should be worried or not!