AHH! Wow. Yes, isn't that great. So you went to an emergency vet? or that's just the place that you had an appointment. Hope there wasn't an emergency.
Bailey had a bladder infection before as well. Hers was due o chronic poopybutt we were trying to figure out what her sensitive digestive system could take. (you can see our trail and errors towards the bottom of the "diet" page. Plus, since Bailey has a crooked spine, she couldn't full lift enough when I first got her. She has gotten stronger over the years (she had been badly neglected when I got her), and she hasn't had a reoccurance of UTI.
Did the vet say how she may have got it? Does she like to hang out and sit in her box like some bunnies do? I have also heard bunnies who don't drink enough water are more susceptible. I know Jack didn't drink enough until I forced him to eat more hay. When I research it on the net, I don't get many answers, so this will have to be a question that I add to my list of questions to ask one of my rabbit gurus!