2 days ago, I noticed that my testicles were hurting at around noon. This pain has grown worse sense then. Currently, it feels like they are being squeezed slightly all the time. Is painfull enough to bother me when I try to sleep at night, and I notice it all the time, although it is not excruciating. I would give it a 5/10 as far as pain level goes. I also have a slightly reddened urethra. Finally, the pain from my testicles sometimes radiates upward into my abdomen (like it does when you get hit hard in the groin). I have not injured the region recently from what I can remember.
I went to the doctor, and they did a urine test (though I'm not sure what for) and it came back normal. I've been tested for all STDs since the last time I had sex (after the appropriate window period). He examined me and said that there was nothing noticeably wrong with my scrotums (torsion, hernia, etc.).
He gave me a prescription for antibiotics, saying I may have mild epididymitis. However, my symptoms are not one sided like epididymitis is.
What could be going on with me? This pain is freaking me out.