Suggest Treatment For Yellowish Penile Discharge

Hello there , I’m a 32 year old male over the last couple of days I have had a slight discharge from my penis , nothing major , dosnt smell and very minimal amount , very pale yellow in colour. Dosnt really burn during or after either , my pee has been shorter flow and very dark . I am now getting a strange feeling up in my backside when i pee almost like a vibrating ticking sensation during steam . Any ideas what this could be . Have had slight lower back pain with , and also shooting pains in my butt