The nurse you spoke with is wrong; the negative tests don't necessarily mean you aren't infected with something. If you're having abnormal discharge from the penis, you have urethritis--inflammation of the urine passage. It is an STD. Your negative tests for gonorrhea and chlamydia make it likely you have nonchlamydial NGU (nongonococcal urethritis). However, depending on what test the doctor did, the result might not have been accurate, and chlamydia in particular remains a fair bet.
You need an antibiotic, probably azithromycin or doxycycline; and perhaps re-testing for gonorrhea and chlamydia. I can't tell whether the nurse's limited knowledge about STDs also reflect's your doctor's understanding of STDs. If in doubt, consider a second opinion at your local health department STD clinic. If possible, plan to visit the clinic early in the morning, before you urinate for the first time; that will give the provider a better chance of seeing the abnormal discharge.
The woman you were exposed to also needs to be examined.
Good luck-- HHH, MD
I've been obsessed with what this is. The couple of days preceeding noticing the cloudy discharge I probably milked my penis over 50 times each day. Not smart, I know, but its like I had O.C.D. and couldn't help it. The doctor also said that my urethral opening is lower than normal (hypospadia?), the opening is towards the base of the meatus rather than at the tip. Can I be causing this cloudy "discharge" (which only happens with milking) with too much attention given my negative tests and my antibiotic history? I was also 2 days into 10 days of doxycycline when I received the unprotected oral sex. The doctor theorizes that since the opening is lower, it is closer to the glands and a broader area in my urethra tube itself that might make such glandular fluid more easily expressed.
jackruby: Such frequent massaging of the penis can indeed cause discharge and other urethritis symptoms. Stop it.
HHH, MD
My girlfriend comes in town today. Is it safe to have sex with a condom? The doc said no sex until my meds are gone.