Several questions there:
What causes urethritis other than gonorrhea or chlamydia (i.e., non-chlamydial NGU)? Not certain; some data suggest a bacteria called Ureaplasma, and a thing called Mycoplasma genitalium is another possibility. No tests are available for these things except in specialized (e.g., research) laboratories. But even when these are taken into account, the causes in many or most cases are unknown. The good news, though, is that except for cases caused by chlamydia, NGU rarely if ever causes serious health problems for men and doesn't seem to imply much harm for one's female partners either.
By "sit tight" I meant don't take meds or go off to additional doctors; just wait and see whether your symptoms go away on their own. Sex per se won't be harmful. But to be absolutely certain that any continuing or new symptoms aren't due to reinfection from a sex partner, if you have sex other than masturbation you should use condoms until this is all sorted out.
I can't tell how long you had whatever it was. When the first symptom is sharp burning, it sounds more chemical than infectious--which is why I still think it might be due to your sexual exposure the night before, just not due to an infection. But if you had sex with other partner(s) in the preceding 1-3 weeks, perhaps that is the source.
I hope that helps. The main thing is that it is virtually certain nothing serious is going on. Good luck--
HHH, MD
so i couldve had it for a long time and no have symptoms at all? and also is it a 100% that the 10 day treatment i did w/doxycicline worked or i have to take another test to be sure? also when u said just sit and dont do anything,does it mean "no sex or no masturbation"? last question when u get diagnosed w/ngu not caused by gonorhea or clamydia what is it caused by then?and how?
thanx so much for your time and help.
I doubt anything serious is going on at this point; the treatments you have had are adequate for just about all the possibilities. You definitely don't have epididymitis. Conceivably a bacterial urinary tract infection, but I imagine your doctor has done a urinalysis or other tests for that.
If you actually had NGU, it wasn't acquired from the unprotected sex incident you describe. NGU takes at least 7 days and often 2-3 weeks to cause symptoms. Burning the next morning means either a chemical irritation (e.g., reaction to a spermicide) or symptoms from something acquired well before the previous night.
At this juncture, I suggest sitting tight and doing nothing for at least a couple of weeks, especially no further antibiotics. Then return to your doctor if the symptoms persist. But I suspect most or all of your current symptoms are related to the stress and anxiety over it all.
Good luck-- HHH, MD