Sorry if I may have missed it but has anyone mentioned the possibility of her having eggs? When my girl has to lay she poos a lot and usually it's small urates with liquid just like a lot of your pics. Even the x-ray looks like she has eggs but I will admit I'm definitely no expert in reading them.
Another thing I just want to throw out there and again sorry if I missed anything, I've been half reading and half watching tv. But she looks like she has a
black beard in some of the pics and I've noticed with one of mine when she had a
black beard when she wasn't feeling well she also had a black tail.