Did you receive oral sex? You can get NGU from normal mouth bacteria. Discharge is always a good reason to get it checked, and not wait to see if it gets better.
There are other things that can cause discharge - prostatitis, urinary tract infection, irritation, urethritis, etc., so it's a good idea to get it checked.
Oh and I forgot to add we both dont have Gonorrhea/Chlamydia/or NGU we showed each other paperwork. And today 4/27/2019 the burning sensation and stinging are getting less and less