Penile discharge that's white in color and comes and goes randomly. pain with urination intermittent but infrequent. no relief with zpack.

Gonorrhea?: Usually this means an STD, but there are atypical features. You had the wrong dose of azithromycin should be 1 gram single dose, but 4 days (Z-pak) usually would work. Could be gonorrhea, which is often resistant to azithromycin. Or maybe a non-STD problem like prostatitis. Don't take any more antibiotic and see a doctor soon. Good luck!