Ever since I was born, my right testical would often seem to grow larger (Up to 1 1/2x the size of the left), and in like 10 minutes shrink down to the normal size, I believe it's the Epididymis that is growing, because if I squeeze it, it's soft, and in the middle I can feel my testical.

It's been noticed when I was very young, but always dismissed.

Is there anything I should worry about?

Also, sometimes I would get a pain in that testical for just like 2 minutes, where it's extremely sensitive, and the slightest touch gives me a pain that goes up to my stomach.

I read about Epididymitis, but I only have like 1 or 2 of the 8 listed symptoms.