Help guys, have you everfelt pain on the testicles?

I started feeling pain on the right ball yesterday. I don't have any lumps, the pain is felt when I sterch or move my left leg brushing up against the ball. what could it be?
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I went to the doctor today, the doctor identified what is like a third free floating ball, but I think I have had that for years. the doctor ordered an ultra sound, will that be able to determine what it is?
Help guys, have you everfelt pain on the testicles?
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