Hello and welcome to HCM. Thank you for your query. Although you seem to be experiencing similar symptoms that you experienced the last time you were diagnosed with chlamydia, it does not necessarily mean you have chlamydia even this time. It is likely yes, but it cannot be assumed without thorough investigation. This could be a simple urinary tract infection or a STI like chlamydia also. Please get investigated and examined to confirm the same. Sexual contact is advised against during the treatment period, as this could result in a reinfection or transmission of infection. But, this reinfection or transmission should take place immediately, not after a long gap. It is highly unlikely for a culture report to report a false-negative report, but it is possible at less experienced laboratories. Please visit a well-renowned laboratory for a good and accurate result. Yes, there is a chance you can infect your sexual partner with the infection again, thus, please get diagnosed and refrain from sexual contact during the course of the treatment and up to 7 days after the last dose of medication. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications. I would gladly help you. Best wishes.