okay is the laying bin big enough what size? also you need to let her be until she lays you dont want the slightest bit of stress or any chance that she will become egg bound because if you dont already know what that means, it means death. Usually when a female wanders to the bottom looking around she is trying to find a place to lay her eggs.
In that last phoo she's not even showing sexually mature coloration so she shouldn't be laying eggs yet...but who am I to say?
I'd put the bin in anyway.