is it possible for both of us to get different std results ?

Hi so I recently tested positive for chlamydia but the guy I last had sex with tested negative. We had unprotected sex but I am just confused am I able to get chlamydia by him although he tested negative?

Also, 4 days before I tested I did engage in oral sex with someone new. I performed oral on him, he didn’t on me but he did finger me. Idk if he could have given me it but it was 4 days before i tested and my doctors say that waiting until at least 2 weeks to test is best for accurate results.

I am not sure which guy could’ve given it to me. I tested negative for throat chlamydia but positive for urine. I also notified both about it. If anyone has any thing on these situations I would appreciate it.