pain in groin and testical doctors can't find hernia or epid

I still don't know what actions cause it, but you were probably pulling something... and considering i'm like a year late on responding to this, anyone else looking at this should know that pain for two days will happen because lower back pain and testicular pain normally mean you pulled the inguinal canal. I did this pulling a rototiller across my yard (yeah, wtf, its only a couple pounds). but pain should subside quickly, and the best way to know its just that, the testical will have no change to itself.