Runny stool in nesting female

I have a year and a half year old female budgie who just laid 5 eggs two weeks ago without a mate. Besides the fact that most of her time is spent sitting on the eggs, she has been acting normally as far as eating, drinking, and playing.

However, her stool is extremely watery and diarrhea-like and has an odor. In addition, the area near her vent appears swollen. I took her to an emergency hospital for evaluation and they can't find anything wrong with her. Are these symptoms typical of a hen who is nesting? Is there a need to take her to my avian vet for further evaluation? Thanks in advance.