Sir I had frequent urination after 20mins myburinary bladder used to be full when I was sleeping whole night I used to urinate after 1 hour repeatedly.. then i did urine routine it showed albumin trace and 2- 3 pus cells .. then I started drinking alot of water but I feel like when I go to urinate I feel like some urine remains inside I feel like urge to go again but there is no urine .. what medicine should I take for it ? Please help .