Gapeworm is rare in the US. I wouldn't waste time on it unless you can look down her throat and see them. You do need to get strong about inspecting her throat. Get someone to help. Wrap her tightly in a towel to confine wings and feet, have someone hold her and pry open the beak wide, and you look inside. Look for any gummy plaque in the mouth and clogging the throat. Look for those gapeworms. You do need to rule these things out.
I'm suspecting she swallowed something and it's stuck in her esophagus which is on her right side of her throat. Look in there.
If you can't do this, you need to take her to a vet and have them do it.
Next, feel the crop and try to think what it is you're feeling. Chickens swallow all sorts of crazy stuff including screws, paper clips, nuts and washers. If you feel something hard and sharp in the crop, give her raw egg whites. It will act as slime to wash a foreign object on down, hopefully.
I'm suspecting she swallowed something and it's stuck in her esophagus which is on her right side of her throat. Look in there.
If you can't do this, you need to take her to a vet and have them do it.
Next, feel the crop and try to think what it is you're feeling. Chickens swallow all sorts of crazy stuff including screws, paper clips, nuts and washers. If you feel something hard and sharp in the crop, give her raw egg whites. It will act as slime to wash a foreign object on down, hopefully.