Hi Sievj..my goes out for you and your bird...i will really pray for her tonight...Ive been there like you before and I know how heart tearing it is but I really hope that Sherlock gets out of this healthy. Im glad you kept her at the facility and I hope the vet tomorrow is really an expert and he can find a cure.
You said her crop is gulging with fluids, but does that mean she is drinking a lot? is she still urinating, because if she is, it means that fluids are passing through her system.
When was the last time she ate and what did she eat. You need to tell that to the vet tomorrow, try to remember any detail you did at home, like insecticide, detergent, medication....this will also be helpful. Also when did her watery stool started?
I really hope she gets better soon, just make sure when u call them at the facility that she is kept warm and visit her early morning , Im sure she would like to see you as soon as she wakes up...
Please keep us posted and we will all send good prayers your way...