there are no set rules. every person every uti every treatment regime etc. is uniquely different. it is even possible that your low-back pain is unrelated to your uti. since i do not know anything about you your medical history details of your uti it would not be possible to specifically comment about your particular case. my advice would be for you to contact your medical provider -- the person who is currently treating you and familiar with your case. since you are still having symptoms it is likely you will need to be re-examined and perhaps have some additional diagnostic tests to make sure your uti has indeed resolved.
how long does lower back pain occur during uti? . im done with my antibiotics but still have lower back pain.