I Just Woke Up From A 3 Hour Nap. I

I just woke up from a 3 hour nap. I usually go to sleep on my side and wake up laying on my back. When I woke 15 minutes ago my left testicle had the worse pain I’ve ever felt. I couldn’t move anything but my arms and my torso a little. I waited and decided I’m not gonna take this and moved my left leg ever so slightly so my testicls would move. They moved and I reached in my pants and touched them and the pain was gone. What just happened to me and should I be worried?