For a male, the main STD risk associated with receipt of oral sex is acquiring gonorrhea, non-chlamydial NGU, or herpes due to HSV type 1. You do not have lesions and if your pain was associated with herpes you would have lesions. If you had gonorrhea, most likely the symptoms would be obvious and if your urine was tested for gonorrhea would have likely yielded a positive test result. That leaves non-chlamydial NGU which would be diagnosed by the presence of white blood cells which are usually seen on urinalysis and would almost certainly be seen if a urethral swab were taken for Gram stain. In persons with little inflammation, it is important that the swab (or urinalysis for that matter) be collected after one has not voided for at least 2 hours (voiding flushes the inflammation away).
If, after collection of the specimens mentioned above, there is still no definitive evidence of infection, then I would side with your PCP. We find it not at all unusual that when a person's anxieties about possible STDs are raised, they tend to turn their attention towards their genitals and in doing so tend to notice things (sensations, bumps, secretions, etc) that are totally normal but in other settings unnoticed. If you have had all or most of the tests noted above, then it is time to stop testing and worrying and move on.
Hope this is helpful. EWH
I asked for a Gram stain at the second visit and the PCP said a urinalysis was adequate. I did void approximately 90 minutes prior to the second test and 45 minutes prior to the first test. With the first test I was trying to drink enough water to flush out anything that may be causing issues.
Thank you for your help. I will continue to ask my PCP for a Gram stain.