Some chickens will act funny after tubing. As long as they are not blowing bubbles out their nose or crackling in her lungs, she's probably just confused about the feeling. Best wishes
I believe the watery poop is from her only getting water and no or little food. I don't know what her exact illness would be. I would give her some drops of poly-vi-sol in her beak, 3 drops and put some in her water. Try force feeding her some scrambled eggs or warm canned dog food.
How long...