Think I read about giving a diode of calcium, like getting up pull in water amount don't recall & soaking her in a warm bath for about 15 minutes. Past that, not sure. Give her some pumpkin maybe? Seeds too to help clear out the digestive tract? Couldn't hurt. Good she's eating & drinking. Much brave than me with the finger checking! If be scared I'd hurt her.
My bantams haven't laid in a while either. Could just be part of the cycle. I did find what I suspect it's a bantam egg from my oldest Cochin. In her spot, her color & shape. So maybe she'll start soon. Is she putting OK weight for winter perhaps too? Far out there thought I know.