Sharp feeling in meatus during walking...

Hi all I'm experiencing a sharp sensation in the meatus during walking, which occurs generally after 5-10 minutes. The sharp feeling is coming from the inside of the urethra at the tip. I have a on-going issue of testicular pains, groin pains and pains in my left side near my hip and occasionally in my flank. I've been MRI'd and CT'd around my pelvis and lower back. Does this sound like infection of nerve damage or possibly something they've missed like a stone??

Have you managed to discuss these issues in-depth with a Urologist, and if so what did they suggest … ?