diagnostic lab testing for non-specific urethritis

[elricthegray]

I have had burning when urinating for many years and tests for gonorrhea have been negative. Still think I have some type of nsu. What are the best diagnostic tests to do to determine if there is some form of nsu,(ie:chlamydia) ? What labs are in the forefront in researching non-specific urethritis ? Are there any test kits available online to determine nsu, such as test strips to urinate on which can determine a specific type of infection? Thank you in advance for any help.

[RankAmateur]

For bacterial NSU infections... sorry, I don't know.

For STI testing, I would recommend freetest.me which my local GUM/STI service now uses for routine screening.