Six weeks after I had my DD, I developed pains on weeing and it took ten visits to the doctors before 'putoink' - out came three pebbles in the loo. Curious DH insisted I fish a few out for inspection and the doc diagnosed kidney stones.
I was convinced that the cat was just dropping stones in the loo (he put a mouse in the loo once so this is not as far fetched as it might seem) and didn't believe him. I was convinced I had damaged my fanjo during pregnancy and that was why it hurt
...perhaps during the pushing stage of my caesarian!