@ossobuco,
Osso, I'm glad you feel slightly less terrible. Hoping for good results on Monday.
Two things crossed my mind when you mentioned the excess comsumption of water: 1) diabetes; 2) Cushings disease, because of the excess water consumption and the urinating in the house. Have you noticed a thinning of her coat?
Maxie was diagnosed with Cushings disease/syndrome in December. It's very common in elder dogs and very treatable, though we're still in a holding pattern with him because he doesn't have the voacious appetite which is necessary for treatment. He's a finicky eater.
I won't link one particular website. There is so much available online.
Looking foward to good news on Monday!