I feel completely fine — do I really need a test?
Yes, and this is the whole point of the condition. Around 70% of infected women and half of infected men have no symptoms at all. Feeling fine tells you nothing. The damage that matters most — tubal scarring affecting future fertility — happens silently, and is discovered years later when it is too late to prevent.
Which test should I have?
Women: a self-taken vaginal swab, not urine. It is measurably more accurate, and urine kits sold to women do miss infections. Men: first-catch urine, having held it for at least an hour. And if you have had receptive anal or oral sex, ask specifically for rectal and throat swabs — a genital test cannot detect infection at those sites, and they are commonly overlooked.
How soon after sex can I test?
From two weeks after the exposure. Earlier than that can miss it — so if you test at a few days and it is negative, repeat it at two weeks rather than treating that result as final.
Does chlamydia definitely cause infertility?
No — most people treated promptly have no lasting effects at all. The risk comes from infection left untreated for a long time, where scarring of the fallopian tubes can develop. Since most infections are silent, the only reliable protection is testing rather than waiting to feel unwell. Treated early, the outlook is excellent.
My partner tested positive. Does that mean they cheated?
Not necessarily, and this is worth pausing on before anything is said. Chlamydia can be carried for months or even years with no symptoms whatsoever, so a positive result gives no reliable information about when it was acquired. It may predate the relationship entirely. It is a genuinely common source of unnecessary harm, and we would rather raise it than let you assume.
How do I tell my previous partners?
You do not have to do it yourself. NHS sexual health clinics will contact them for you, anonymously and free — your name is never disclosed. Using that service is the responsible option, not a lesser one. It matters, because untreated partners will reinfect you and may be unknowingly harming their own fertility.
When can I have sex again?
Seven days after finishing the course — and not until your partner has completed theirs. That includes oral sex, and it includes using a condom. Skipping the second half of that rule is the commonest reason people are back with the same infection a month later.
I got treated but the test is still positive.
Usually timing rather than failure. The test detects the bacterium's DNA, including from dead organisms, so a test of cure done within five weeks of treatment can read positive when the infection has cleared. Wait at least five weeks. A genuine positive after that suggests reinfection or a treatment issue, and needs reviewing.