Sarah did have a small Urinary Tract Infection for my birthday (and I think she had something else, virus-wise, working on her system too). The doctor who examined her that night, called on the following Sunday to tell us that Sarah's test results/cultures came in positive for a UTI, so we started her on antibiotics.
She was also teething...4 molars were trying to work themselves out of her gums. As I write this post, I think it's safe to say that those few weeks of torture are over with.
It's amazing how a child's character can change when they start to feel better!