Just guessing here, but maybe she had some bladder sludge that got losend and came out after this ordeal. That would be excess calcium that got deposited in the past.
How old is she, and how did the pee look like, did the white stuff settle, was it mixed in evenly, or where there strands or clumps?
What is her diet? If you are not used to see white stuff setting in bunny pee it might be that that her food is low on calcium - which is not bad normally, but they need quite some calcium to grow the kits bones, and a low level can cause birthing problems because it is needed for the muscles to work properly. If you come into that situation again you can give the doe a Tums (or whatever similar is available where you live), I made cookies from oatmeal, soaked pellets and finely ground egg shells for that purpose.
Good that she's eating fine now, keep an eye on her in- and output, but I don't think this is something to be alarmed about right now.