Unwell duck... What's going on?

[Jlw0903]

How do you know it can’t be an egg because it’s too early in the year? Where are you located? Some of my ducks have started laying already this year. I’m in Maryland.
It certainly would not hurt her to give some calcium gluconate and if it is an egg it will help get it out. 1 ml per day for a few days is ok . Orally with syringe. This is what I use View attachment 4293368

I'm in South East Wisconsin. I've always written down when we get our first eggs of the year. As the ducks have gotten older they start laying later and later every year. Darla is 6. She may have laid 2 dozen eggs in total last year. She likely wouldn't start laying until March at the earliest.
My young ones will start any day though.