What Causes Back, Side Pain And Frequent Urination?

I have been suffering from back pain in my right side for several months, I was put on antibiotics right away because of the amount of blood found in my urine (3+) but the antibiotics didn t help I was put on much stronger type and those didn t do much either the urine tests did not grow bacteria just blood, a ct scan showed nothing wrong blood work showed my body could be fighting a virus, after about 2 weeks I started to have back pain only not much side pain, after a month of physiotherapy it started to get better (the only thing I changed was taking fiber supplement) now my back is much better with only some pain but my side continues to hurt especially when my bladder is full, I have had frequent urination for over a year and have had some utis in the past but urine cultures continue to show nothing significant but some blood