the couple lied about being clean... found out 6 weeks later

gutted writing this. met a couple in dublin via an app, they swore blind theyd tested in june. we played unprotected with the women (me and her), partners watched. lovely night actually. six weeks later i go for my routine and bam, chlamydia. messaged her, she goes "oh yeah we havent tested since february sorry babes". sorry babes. SORRY BABES. like she forgot to bring milk. we've told everyone weve been with since but the shame of being the messenger is unreal. how do you trust anyone after this. do i name them publicly. im 41 partners 43, weve been swinging 4 years and never had this happen