No one had me do anything. THAT would be weird. A pap is uncomfortable. A vag ultrasound is nothing. Not uncomfortable and the view will be better than a regular ultrasound.
A duck will usually lay one egg either every day or every other day.
If you find a wild duck's nest on your property and don't see the mother on the eggs, don't necessarily worry. Ducks lay an egg every day or two until they have a full clutch (usually 8 to 15); only then will the mother start to sit on them. It takes the eggs 28 days to hatch from when she starts sitting all the time.