You need to get another urinalysis done to check whether the bacteria is still there. If it is, then they should change the antibiotic. Many antibiotics aren't working as well as they used to, due to over prescribing of them.
A suggestion: I take cranberry supplements. It's called ''Organic Cranberry Pure'' from Whole Foods Markets. You can probably get something similar in a health food store. I take one daily. Since I've been taking them - NO MORE UTI'S

I prefer this supplement over cranberry juice, which I don't like the taste of plus it didn't help me, either.
Monte