I went outside to let the girls out for the day, and Blanche is quite sprightly! I checked over the coop to see if she had passed anything, and there was this very globby looking pile of yellowish looking stuff with poo, so I am going to assume that was her egg innards from yesterday. Even though she is more herself and chicken-like this morning, I am going to keep monitoring her for signs of infection. Thanks for the kind words everyone!
As a side note, we have decided to NEVER name the chickens again. When we are ready to replace The Golden Girls, they will still be important chickens, but we will try to keep them as far from "pets" in our minds. This sick chicken stuff is for the birds! (yeah, pun intended)