you most definitely should get another urine test /culture. if the lab tests are negative you may not need another course of antibiotics but other causes for your symptom array should be medically-explored by your doctor. before considering "alternative therapies" (whatever you were planning) it is best to be properly diagnosed.
should i have uti rechecked if still have lower back and abdominal tenderness along with urinating frequently? . finished sulfamax four days ago and hate to be on another course of antibiotics. could i explore alternative therapies?