Sounds like you had too quick of a testosterone spike then it dropped quickly. This caused your epididymis or "sperm tubes" to get clogged and inflamed. The prostate is also getting swollen and aggravating the testes ad well.
The best way to get the pain to stop and get the tubes flowing is take your finger and massage your prostate via your anus. After a few minutes, flick each testicle as hard as you can stand. This should free the clogged tubes. Hope this helps. Let us know how it goes.