Alrighty...to help you figure this out for sure...and possibly ease your mind, here's what you need to do to find out for sure if there is an egg there or not.
This is rather gross, but completely do-able! You need to grab a vinyl glove if you have one, lube your pointer finger with...
If she is otherwise acting normal she probably isn't egg bound. When chickens have to get used to a new environment, establish a new pecking order and change feed it can cause them to stop laying for up to a month! (Usually more like 2 weeks.) I would watch her for egg bound behavior before...