Ugh! STI

So I slept with my ex bf a month ago (first mistake) second we didn’t use protection. I know I’m beating my self up about it 😖 and I got tested recently. Turns out I have chlamydia... took the pills and called him. A little backstory I was madly in love with this guy and he was my first and has been my only partner ever. So I know it’s curable but I feel so dumb. But here’s the kicker he showed me his results of his test and it says negative. He got his results January 17 and I got mine today March 3. I last slept with him January 1st. Now I’ve learned my lesson and condoms will be my best friends. And I know for a fact I haven’t been with anyone else, no kissing, oral sex I haven’t even held another persons hand 😔 I’ve read some people don’t show results on tests or that it’s dormant or something...

What do you guys think?