A member who had an egg bound duck took her to an avian vet and the vet gave the duck an injection of Calcium gluconate that causes contraction that gets the egg moving. And rec the liquid for any poultry having this issue. Many of us have used it and it does work sometimes it has to be given...
She may just be starting back and is having trouble with her first egg of the year. My Runners eat oyster shells like its candy and they are also on layer feed. You can't always feel an egg. Plus all the symptoms you mentioned sound like a laying problem. The Calcium Gluconate will not hurt her...
I would def get her on some Calcium Gluconate sure sounds like she is having difficulty laying. Letting her soak in some nice warm relaxing water can help and I wouldn't keep her with the gander in case he wants to mate with her.
What do you think @Goosebaby?
If you don't have cal glu you can...