I only had oral sex. ive been having green discharge and slight itch no odor,and burning when urinantion. ive been prescribed 1 shot of ceftriaxone 1 mg and azithromycin orally 1mg dose and fluconazole 3 two weeks,why theres still green discharge?

Discharge as described is usually a bacterial infection. If no antibiotic sensitivity was done, resistance to a particular antibiotic will reduce or eliminate effectiveness of treatment. A repeat culture/sensitivity may be necessary.

Oral sex can result in nongonococcal urethritis (NGU), probably usually due to non-STI oral bacteria. Doxycycline is recommended when azithromycin isn't effective. But don't get over-worried: NGU from oral sex is generally believed to be harmless.

you need to see a Gyn for proper diag and management.