Hi i am 13 years old and my right testicle is about 1 and a half times as large as the left, and i have seen in diagrams there should be a small sack behind each testicle, I think i have it but it is not behind, on my right it is above/in front and on the left it is below, and on my right what i think is my spermatic cord is very thick, about 3/4 mm thick. Much more than the left. My left testicle is about 2-3cm, and my right 3-4. As for pains, for six months I have sometimes experienced a dull ache above the right testicle but not much else.Should I be Worried?Thanks