Just an update folks.
When I went to the vet, he said (after the x ray) that there was no egg in there, and he could tell that there would be no egg in the near future.
Turns out there was an egg, as one has just been laid. It is a nice hard and healthy egg.
I am not sure if this is a good sign or not. She is not eating her medicine anymore... not eating anything hand fed anyways (this is normal with her and egg laying time) But surley if a bird was seriously ill... it would not consider laying eggs... and then the eggs turn out to be perfect. Surley if the bird was ill, then the egg would not be as perfect as it.
Another potential issue that I noticed, is at one point today, she basically puked up some seed. This was not puking as such, it was more hecked up. This didn't seem to pose a problem to her, and I was wondering if it is possible that this happened due to a maternal instinct or something? I must say that I have never noticed it before at egg laying time, and it is an egg not a baby so yeh... bit strange.
Anyway, thanks for the help, It just seemed a significant development and thoughts are appreciated.