It is unfortunate that you're facing this problem.
Usually testicular pain so shrilled and it is common when you have a blow or any kind of injury to the scrotum. Other causes of testicular pain without trauma are, prolonged riding of two wheelers, infections, some hernia's.
Usually if the pain is because of the two wheeler driving then it usually goes.down in 2-3 days. If it prolongs more than that then you need to get medical assistance from a specialist.