Background: 1. In November 1, 2019 I Had Unprotected Sex

Question: Background:

1. In November 1, 2019 i had unprotected sex with my girlfriend. She suspected urethritis at the time but now in retrospect maybe it was a UTI.

2. November 13th. I got strep. Took amoxcillin for 10 days.

3. November 17th after having sex 3 times in 1.5 days after the last ejaculation i did not release sperm. And i felt pain. The next day was a sudden onset in my testicle of pain. It was hanging lower and swollen.

I have taken the following test since then:
A. Ultrasound of testicles
B. Blood test (CBC)
C. Chest x Ray
D. Urinalysis and std test
E. Urologist did a physical exam of the testicle and pelvis.

Only thing noticed was a 2mm epididymal cyst. Doctor said that was not of concern.

Now 1 month later my symptoms remain as followed:
1. Tender testicles
2. Swollen right testicle that hangs.
3. Aching in the testicles and pelvis
4. Frequent urination at night

My questions are what additional tests can i take? What could this be? What could alleviate the pain?

Urinalysis showed leukocytes slightly above normal. Every other category was in the normal range.

I got a rectal exam last year and not this year. That exam was normal. He stated i had urethral spasms that manifest with some prostatis like symptoms.

What i don’t understand is why the swollen testicles?

Another key point to consider is that the swelling comes and goes. The testicles are always tender but the swelling may last for 3 days and then goes to normal for 2 days and then swells back up.

There is no rhyme or reason to it or anything abnormal i am doing on the days the swelling goes down

Additionally i read something about the mumps causing testicle swelling. Is there a test for that? And any likelihood of that being a culprit? How long would it last?