I'm An 19 Yrs Female. Two Yrs Back Following Proximal

I'm an 19 yrs female. Two yrs back following proximal stricture in right ureter, stent was implanted and on review after two months,stent was removed. Recently, I'm finding intermittent obstruction in flow of urine with incomplete emptiness of bladder. Recent RE & CS of urine do not show any growth. X'Ray and ultrasound of abdomen do not show any inconsistency in abdomen. But, I'm feeling the flow of urine is interrupted and bladder is not emptying fully. No other associated symptom such as fever, chills, nausea exixts. Local Physician suspects hidden UTI and prescribed "Oflin" which I am taking......but no improvement...................Kindly help me out to decide further treatment........Regards,