Make sure the water bowl is right next to where she loafs. I found this helped when my girls were desexed. They didn’t want to get up and go to the bowl.

You might need to cut down on the spinach and kale for a few days and see if that helps with the pee issue. It might be excess calcium from those.
It’s hard to say if her struggle to pee/poo is because she’s feeling tender or due to her passing the sludgy stuff. Definitely encourage the fluids.

I second jerseygirl, remove kale and spinach from the diet for the time being. Both are pretty high in calcium so it’s possibly she’s developing bladder sludge. Encouraging drinking is definitely a must, however she may have been drinking a little less if she was getting plenty of fresh leafy greens.

If it turns out to be sludge and continues to progress you may need to see the vet. I also wouldn’t give any high calcium greens for several weeks, just to make sure her system can clear things out again. If you do reintroduce them, don’t give more than one a day. I also liked to make sure I never gave a high calcium green two days in a row.

Broccoli flowers and stem, cilantro, dark leaf lettuce, watercress, Brussels sprouts, celery leaves, cabbage, and endive are good choices when trying to reduce dietary calcium.

source: http://www.rabbit.org/journal/3-5/calcium.html
There is a list at the end of the article that may be useful to you.

Out of that list I personally don’t like to feed broccoli, brussel sprouts or cabbage because they have a tendency to cause gas which Bandit was quite susceptible to, but some rabbits may tolerate those greens better than others.

In addition to those already listed, chervil, mint (not pennyroyal – toxic, all other spearmints and cooking mint are fine) and romaine lettuce are also good choices. In terms or lettuce, not rocket/arugula as that is high in calcium also.