Trabeculated Bladder. The next steps.

Hi Doctor I am having frequent UTIs from past 1 year. Symptoms: Frequent UTIs, weak urine flow, Urgency for urination, no urine Pressure sometimes for 6-7 hours after drinking a lot of water. TESTS DONE: RGU Normal, Uroflowmetry shows weak urine flow, TRUS Normal, cystoscopy shows Mild Trabeculated bladder. Doctor prescribed alfoo 10 mg which does not suits me and does not tell the cause of trabeculated bladder. I have urethritis too which is NOT getting cured after antibiotics too Please let me know what should be the next steps as this has affected my day to day life and health a lot and prostate seems to be normal and no urethral stricture issue. Please help me with the cause and the next steps. Thanks