I am experiencing pain in my on the right testicle.?

I ran yesterday without any warm up or stretching after a long time. My left testicle is hanging below my right while the right is paining. I occasionally hit the gym also. I am really worried and am having problems walking for the last 20 hours now. I got a good night’s sleep and rest and the pain has subsidized. I wonder what it is and why does it keep happening to me over and again. I read online and it could be hernia or a groin injury. Please advice treatment for future and present also.