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Yes. It sounds like you have a UTI that would require antibiotics. If your doctor won't do a urine culture, you need to go to another ER where they will treat you properly Hope this helps.
You're getting worse because the metronidazole does not treat most UTI bacteria. You need an official urine culture, not just a urinalysis that you had done. You need a course of antibiotics as well.
It depends on the official results of the urine culture. But while your doctor is awaiting those results, you should be placed on antibiotics.