I've been having unprotected vaginal sex with a female. 15days ago I got minor amounts of whitish discharge coming from the tip of my penis, it was followed by stinging at tip of penis and mild burning/discomfort after peeing. I went and got an STI screening (urine test) (3rd day after initial symptoms), Came back negative for all sti's tested by urine, i also was told its Not a UTI. My partner has no symptoms. Saw my doctor again, he suggested it's NSU caused by friction during intercourse with a tight female. He prescribed me antibiotics (Azithromycin). I completed the full dosage two days ago. I still have the discharge (whitish, small amounts of discharge but hapening throughout the day) with very mild irritation in the urethra area.
What is my next step here? Does this go away shortly after taking antibiotics? Could this be something else? Do i need more tests?