Suggest Remedy To Relieve Pain Radiating To Groin And Bottom

Hi, for over five years now, i've been experiencing severe constant burning sansation on my right side, which radiates to my groin and right bottom. It becomes more pain when I ejaculates after sexual intercourse. I've seen my Doctor who has refered me to a urologist for ultrasound and CT scan, but nothting was discovered. I've been placed on pain killers, but no solution. I'm so worried, please advice