Hello Doctor,

I am a 27 year old guy, and had sex for the first time with an escort about a month ago, and then 2 more times after that with 2 other girls within a few days later.
The 3 times that I did it, I used a condom properly for oral and vaginal, and never kissed at all. Ever since the first time I did this, I started getting a terrible groin pain on my left side and this happened following the first time, and also pain on my pelvis left side. A few 2-3 weeks later I started getting a terrible ache on my left testicle, and notice a big lump under the left testicle every single morning after I wake up. Now about 4 weeks later, I notice I get the big lump under both of my testicles but only after waking up in the morning. These lumps are inside of the testicle located in the tail of the epididymis. During the rest of the day I don't feel the pointy lumps but do feel like the left testicle shrinks a bit and feel a mild pain that goes to my groin and inner thigh and a bit behind my leg. I would like to add that I also run very long distances, over 2 hours of marathon running, but had to stop due to the pain. I also did some heavy weight training in certain days. I went to get a color doppler ultrasound and the doctor told me I had a level 1 varicocele, a tiny cyst on top and on the bottom of my left testicle only, and no hernias (maybe sports hernia?), also did a general blood and urine test and nothing showed up, I am not sure if those are different from std tests, or is it possible that they could show up there?
I do not feel any burning pain when peeing nor do I have any leaking from my urethra. Could this be related to an STI or STD? could it be a case of chlamydia (maybe Epididymo-orchitis)? or maybe a muscle strain or injury from sex? Could varicocele cause this inflammation?

Any help regarding this is very much appreciated.

Thanks,
Charles