... get it checked out. They took an ultrasound and checked my urin. But they said they couldn't find anything wrong, but it is still bothering me a month later! IV had to watch how IV been sitting and how I lay down. Recently I found a small pea size bumb under that same testicle! IV been having back pain and today I had an extreme headache, I don't know if that's related but im very concerned that I have testicular cancer. I'm 22 I work out and eat very well. Please help!