Welcome back to the Forum.  Thanks for your continuing confidence in our service.  On this occasion I happened to pick up your new question and in preparing to respond I reviewed your earlier interaction with Dr. Handsfield.  I agree with all that he said including    “NGU from oral sex is believed to usually be caused by normal oral bacteria. The urethra sees them as strange and unexpected, and reacts with mild urethritis. However, it probably always clears up even without treatment, and probably there are no traditional STD germs present to cause infection in partners. It is unlikely that your urethritis had anything to do with your partner's vaginal discharge. So many women get vaginal discharge from time to time that It's basically normal,”  This remains the current understanding of nearly all non-chlamydial NGU.  If anything, non-chlamydial NGU is more common following unprotected insertive anal intercourse than from oral sex.  In your case however, if the condom was worn throughout the encounter and did not break (breaks are obvious) this would be unusual.  The other possibility here is that you may be looking too hard for signs or symptoms of infection.  We regularly find that when clients are concerned about STI risk there is a tendency to look carefully for symptoms and, as result, tend to notice normal sensations in a way that they would normally overlook.  I wonder if this may be what is going on here.

In response to your specific questions:

1. Could my assumed non-sti bacteria NGU from 10 years ago still be causing symptoms?  If so, do me and normal partner need treatment.  My doctor says no given the testing. Mo.  Non-chlamydia NGU would have resolved, even without therapy years ago.  I agree with your doctor that neither you or your partner need treatment.

2. Could this latest partner have given me an STI that is not picked up on 6 urine naat tests from 2 labs?  I hear urine misses some infections?.

No!  you are correct that rarely urine NAATs miss infection but this is statistically virtually impossible after multiple tests.  NAATS are among the most reliable tests in all of medicine and if you were infected, your test would have been positive

3. Is mixed flora something that is normal or do i need an antibiotic given the symptoms of no discharge but irritation that is admittedly periodic.  It normally is irritating the urethra tip after (not during) i pee or defecate.?

That your symptoms are intermittent is suggestive that you may be looking too hard for symptoms as I suggested above.   I really see no need for further testing or for treatment.

I hope this perspective and information is helpful  Please don’t worry.  EWH