The longest I've ever seen anyone have chlamydia and not show symptoms is a year and a half.
Its possible it can be a bit longer, but not much.
You wouldn't have it for 5 years and not have a positive test or major symptoms.
AJ
It may take from days up to years to show up (rarely, actually).
What about an example?
I THINK I got Chlamydia for about 5 years. I got tested 2 times and nothing was found.
You must ask your doctor for a full scan.
See ya.