All of this, the crop issue and soft egg is likely connected. Obstructions in the reproductive tract can affect movement of material through the digestive tract.
Was the egg without a shell or was it a very thin shell? If it was shell-less, there may be another egg right behind the first one making her feel rotten. In my experience, very often there are two eggs involved when a hen shows symptoms of egg binding, as your girl is now.
Keep up the miconazole to keep the yeast under control. But give her a calcium citrate tablet right now to stimulate contractions to expel a second egg that could be causing her to feel unwell. This is what you want to give her. One whole pill directly into her beak, or break it in half and give her both halves one right after the other.
Was the egg without a shell or was it a very thin shell? If it was shell-less, there may be another egg right behind the first one making her feel rotten. In my experience, very often there are two eggs involved when a hen shows symptoms of egg binding, as your girl is now.
Keep up the miconazole to keep the yeast under control. But give her a calcium citrate tablet right now to stimulate contractions to expel a second egg that could be causing her to feel unwell. This is what you want to give her. One whole pill directly into her beak, or break it in half and give her both halves one right after the other.