This may be prostatitis or epidydimitis. A visit to a good urologist would be best. Take care.
Even if this pain occurs daily (which is the only symptom that continues to occur) and I had other STD symptoms earlier which have since vanished? (Sore throat, burning sensation in the urethra, abdominal pain, red bumps, ect.) What else could cause this within a few days of a sexual encounter?
It's not an STD. STD's do not have symptoms that come and go. And the onyl ones that could cause the pain you are talking about you have already tested negative for.
Oh, and I tested negative for chlamydia and gonnorrhea and a urinalysis came back fine but showed small trace amounts of blood....