I am 18 years old and I am having a problem with my groin. It really bothers me after I involve in a physical activity with running. The closest description would be my right testicle being ripped out. Sometimes the right testicle enlargens and hardens. I do not feel the a lump or vein above the testicle which I do in the left one. I am really scared that this might testicular cancer. Can someone please clarify this for me?