After mr RP I had pain in the right testicle too! The pain was caused by cysts in the
epididymis which is on the side of the testicle. I could CAREFULLY
feel the cysts. My pain radiated into my lower abdomen. I finally had the epididymus removed which also removed the PAIN. Hope your problem is not related and will clear up - but thought I would relate my problem FYI. Best wishes, AL