Thanks for using JA.
You should first have a testicular ultrasonogrphy. Because the cause of the ache could be a cyst or a dilated vein. Both benign.
You could also have an abdominal ultrasound just to check if there is not another kidney stone. Less likely.
Meanwhile take Advil 3 times a day.
If you have any other question just make. I´ll be happy to answer.