I have penile discharge, feel like i have to pee! std tests came out neg. also negative on culture & sensitivity exam. can it be trich? if not what?

Need more info: You could have trichomoniasis or another non-gonococcal or non-specific urethritis such as ureaplasma. I assume you have been evaluated for gonorrhea and chlamydia. I would recommend returning to the doctor for further testing and abstain from sexual contact until properly diagnosed and treated.

Prostatitis?: Discharge and a strong urge to urinate sounds like a prostate infection. You could also have chlamidia which can be hard to identify. This will require you to visit a urologist and have a prostate examination.And start on a course of antibiotics.

Continue antibiotics: Would treat for urethritis- aztithromycin or Doxycycline would be reasonable choices. Would see a urologist or visit an std clinic. Would also consider a single dose of ceftriaxone.