Sounds like the epididymitis to me.
Like you said, should be around the size of a pea but no bigger. If it’s sensitive when you touch it, then you should be fine. It should be relatively hard it texture, but soft enough so that you are able to gently squeeze it.
I first discovered these as a youngster and as I hadn’t noticed them before it had me worried. Also, at the time I was watching the episode of Tom Green were he gets his testicle removed and that just didn’t help at all. So I got it checked out.
I’m no doctor. So if it is worrying you you should always get it checked out.
"Al, over the years we\\'ve taken roles from one another. People have tried to compare us to one another, to pit us against each other and to tear us apart personally. I\\'ve never seen the comparison frankly. I\\'m clearly much taller, more the leading-man type. Honestly, you just may be the finest actor of our generation - with the possible exception of me." (talking about Al Pacino)
- Robert De Niro