Hey man, I myself had severe teste pain awhile back. It scared the shi* outta me. I wasn't exactly sure what was going on but it got so bad I took myself to the emergency room at the hospital. I thought it was Epididymitis which is inflamation of the scrotum. Anyways i got sent to another office after they performed a uryanalysis test and that doctor also did the same thing. After the appointment it just stopped hurting. Still to this day I have no clue what it may be. The best thing to do is to get tested. although "knowing" you have something is scary!
Check this page out and let me know if it helps you out at all. Read into it man, good luck!
http://www.medhelp.org/Medical-Dictionary/Terms/1/003111.htm
(could be any of those so read into them!)