A swelling of the epididymis (not positive if it swelled, it just protrudes and it seems peculiar to me), slight itching but usually only with heat and also an occasional sharp pain (although not for more than a second or two). there are no visible rashes or blisters. as I've already mentioned, my partner and I were monogamous and we had no encounters with each other or anyone else before this first oral encounter about three weeks ago. does this sound like something to be serious concerned about?

If it doesn't hurt much, it probably isn't epididymitis. consider the possibility of a spermatocele.

See the link.

Any signs that look like they might be an STD are something to be concerned about. and yes, you can get it from oral sex.

Go see a doctor. If you have worries about embarassment or the like, then look at it this way: You may have something wrong with you, and if you do, you need to get it fixed or it will get worse.

Treat it like any other health issue and you'll do fine.