I just discovered a slanted grey streak across the bottom of my testicles, I'm 32, it has never been there before and I have no STD's, UTI came back negative on my uralysis, urine is dark yellow and really smells, I'm scared and I'm away from home traveling where my health ins. doesn't cover, been on Penicilln and Flagyl anti-biotics for 4 days, please help, thank you