good thing you said it :-D
no, don't do what i just advised you, i didn't think they're that weak.
in that case...they're probably just too weak to expand, and now, in the fourth week, the situation is probably the most critical, number of bees has dwindled a great deal, but they new ones are just taking their places.
i hope you don't have them in a 10 frame hive box?? if so, limit their space to the ammount they can fill.
i really can't tell what the cause of lack of eggs is:
-too weak colony-they don't allow her to lay any more.
i really, can't advise you any more, or should i say, i shouldn't, i'm just not experienced enough, plus i might misslead you like i almost already did.
wait a day, so the veterans may answer you.