Okay I would love for the egg to hatch. Yes I get some pictures. We have it under a heat lamp.That is normal for ducks. They will lay an egg and leave for awhile.
Could you get a picture of the egg when you candle it?
Eggs can go for a week or two without heat as long as it hasn’t started incubation yet.
You could incubate the egg yourself, or maybe even put the egg back in the nest and see if mama duck will incubate for you.