Re-check her crop first thing in the morning before she's had anything to eat/drink - it should be flat/empty. If it's not empty, then you can begin addressing her crop. Read this article along with the comments to help access which treatment you need to follow. Let us know what you find out. (Empty with squishy stuff is not empty is it(?) possible sour crop)
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/
Very often if a crop is not emptying, then there's an underlying illness/condition that is causing the digestive system to slow. Could be a partial blockage, reproductive disorder, infection, worms and/or coccidiosis among other things.
Consider taking a sample of poop for testing to see if worms are an issue. Some vets are agreeable, some not. If you can't get a fecal float, then de-worming her may be of benefit to her. Safeguard can be found at TSC. Dose is 0.25ml per pound of weight given orally once a day for 5 days.
Do check her over for lice/mites while you are determining if her crop is emptying.
Her not laying eggs for days - unless she's molting, then this a concern. She may be starting to have some reproductive problems. Which one, it's hard to guess. I would start with checking the crop, looking for lice/mites, deworming and go from there.
