Becka, you should be feeling better in about 4 hours from the antibiotic - definitely by tomorrow (usually takes me about 12 hours to notice a difference). Keep drinking lots of water today - lots of water. If they gave you a second med with the antibiotics, that is probably a local anesthetic which will help tremendously with the discomfort and pain until the antibiotic kicks in!
I agree with the previous posts on cranberry juice as a healthy preventative. We always have one bottle going here in our house - there are some great blends out there now - strawberry, peach, etc - so if you aren't a cranberry fan, try one of those. I have also found that the store brand does have a different flavor from Ocean Spray - my store brand is more bitter. I now tend to stick with Ocean Spray - it is smoother to me in flavor.
I also agree about yogurt - stock up when on antibiotics!
In fact, I have a Yoplait yogurt, 8 ounces cranberry juice, calcium supplement and a multivitamin every day, just to help normal "balance", so to speak. As I am approaching 40, the body seems to be changing.....
shelle94 - wow - I'm glad you were diagnosed - best wishes as you overcome this infection!