Hi Tom, not may people advise here but as mentined if you had Gono you would have a
white puss
discharge, its possible that chlamydia might not show signs but ive had both 3 time in my life and always got a puss discharge, burning while urinating and with chlamydia, itching inside my urethra. These are the most common stds.
Not showing symptoms would be more with women as they can have it inside the vaginal area which is an open cavity.