Welcome To BYC
I'm sorry she's not doing well.
Can you get photos of her and her poop?
Can you check her crop to make sure it's emptying? Feel the crop tonight when you put her to roost/bed (at dusk). Check again first thing in the morning before she's had anything to eat/drink. If the crop has not emptied or feels boggy/squishy, fluid filled or hard, let us know, you'll want to address that
symptom.
I do agree, I'd give her Extra Calcium for several days, see if she expels an egg or lash material.
Check her for lice/mites while you are examining her.
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