About a week ago I started to feel a strong burning itch inside my urethra and on my glans and foreskin. This developed into burning pain while urinating and a more frequent need to do so, and I started to have a yellow discharge, thick at first, then less so. My partner developed a sore throat in the mean time (we had unprotected oral sex). The doctor we saw diagnosed almost certain gonorrhea and perscribed ciprofloxacin 500mg in one go to be repeated 24hrs later. Also gave us Zithromax 1g in one go, for three days, to cover chlamydia. 20 hours after the first medicine, however, my penis still burns when peeing and the tip is very red round the opening (wasn't before...).Should the symptoms have gone by now? How long does the medicine take to work? Or could the diagnose be wrong?