Sounds like they gave you Cipro, Levaquin or Avelox. There are thousands of lawsuits and forums on the side effects of these drugs. People online call it "being floxed." My boyfriend and my cousin both have trouble walking after taking this drug. My boyfriend needs to walk with a cane now. Just check out some "being floxed" forums if you are even thinking of taking this drug. Taking a second round is even more dangerous.
Actually, if you now have no infection and your bladder still hurts, it could be from a previous round of Cipro. Years ago, I thought I was getting a bladder infection so I went to doc and was given Cipro. My bladder was maybe hurting at a 2 or 3 but after 2 pills of Cipro the pain went to an 8 and stayed there for 3 months. I ended up having no infection, but cystitis. I went online to check forums and the best advice I got was to take Advil - it stopped the pain, along with Marshmallow Root which sooths pretty fast and Uva Ursi.
Marshmallow Root is a urinary track soother. If you look at the reviews for this root on Amazon, many people say marshallow root and D -Mannose cured them. There are 94 reviews for Nature's Way Marshmallow root (66 are 5 star). Uva ursi is an herb often used for bladder inflammation. Buffered vitamin C , alka seltzer gold and baking soda also help to buffer the urine.
Here is a recent New York Times article (last week) on fluoroquinolones.
http://well.blogs.nytimes.com/2012/09/10/popular-antibiotics-may-carry-serious-side-effects/?_r=0
and an article on uva ursi.
http://www.livestrong.com/article/314600-taking-uva-ursi-for-urinary-tract-infections/