You can pick up the strips to test your urine at any of the drug stores. If you have one, you can feel more confident going to an urgent care place for a prescription.
As it is, I've decided to wait until Wednesday to go to my regular doctor. That way they know my history, I can discuss with her getting an rx on an as needed basis since I'm so prone (and I know what triggers them), and also discuss with her something else I need to. My symptoms aren't bad (as of yet), so I'm just taking cranberry pills and cystex when I need it to get me through tomorrow. Right now I feel fine, thankfully. If this is a UTI, its no where near as bad as some of the ones I've had. Curse being prone.