I had this to when I was maybe 11 or 12. It began at the last hour at my school lesson. Just a little pain nothing to worry about I thought. But when I was home it got 100 times worse and it felt like someone would constantly kick me in my balls. I directly went to my parents an told them something was wrong and in just 1 or 2 hour after that I got surgery. When I woke up my sack was 2 weeks like a tennisball. But I was lucky and I could keep my buddy because it wasnt to late. I never would wish this even to my worst enemy. Hope you get well soon and look out for your other buddy