At least it's not syphilis

Where you intimate with your ex without using condoms, regardless of when? If so, you should have gotten tested before having unprotected sex with your fiancé, it's common sense. Not only does it prevent the spread of disease, but it's good for you. Chlamydia can do damage to your reproductive organs if left untreated. ydi for not getting tested after engaging in risky behavior.

*****

Unless you cheated on your fiance, I don't see why you would be so worried about telling him. It sucks you didn't get tested in between partners though, but I'm sure it's understandable since a lot of people I know still haven't gotten tested a single time -.- Either way, you're putting his health at risk, so don't chicken out and be sure he & yourself gets tested!

Has anyone considered that maybe the ex heard about the engagement and was hung up about it (perhaps still having feelings for the OP or perhaps just a prick) and made up having the STD to waste the OP's time or freak them out and start conflict? Not saying it happened, but a possibility, yeah?

Wait what happened?

Men don't necessarily show symptoms, stop repeating this myth.

I'm kind of confused why everybody is putting YDI? the way OP posted this was that her ex texted her and said she has chlamydia and she has to tell her fiancée. I don't see a problem with that at all.. she never hinted off or said that she slept with her ex recently. if that's the case then she definitely deserves it. but it just sounds like she got chlamydia from her ex when she was with him and has to tell her fiancee..

Oh, the joys of pre-marital sex.

Be happy it's curable and your ex could have gotten it after you.. You should have gotten checked first before bringing up to your fiancé ... Just sayen