If you suspect you have a urinary tract infection and are not experiencing severe symptoms such as fever, lower back pain, or nausea, you can wait up to 48 hours before consulting a doctor. You can take Advil to help alleviate the pain in the meantime. Remember to stay hydrated by drinking plenty of water. Additionally, if you have had a UTI in the past five years, your pharmacist may be able to prescribe the same antibiotic that was effective for you, under certain conditions. It is best to consult with your healthcare provider to evaluate your symptoms and determine the best course of action.