For about 3-4 months now i've had pain during urination, it's never extremely painful, but it is enough to be bothersome. On somedays it's better than others, but it's also less painful with lower concentration. I went to the doctor about 2-3 weeks ago, and they found nothing in my urine, so they basically have no idea what is wrong. They didn't test for STD's because i'm 16 and not currently sexually active. Every now and then during this time, i've noticed some sensitivity as well as a light amount of pain behind my right testical. The pain usually only occurs when they shrink due to cold. However, the last couple of days i've noticed some pain when in certain sitting positions, and when i apply pressure behind the right testical. Any help or advice would be much appreciated.