doctors?Nurses? STD

Hello Glows!
I have a question. So I'm with my sons and unborn daughters father. When I was pregnant last year he gave me a lot of stds. He took the meds but I guess he was dumb and drank. I'm currently pregant 26w2d 
And I got a call yesterday saying I have Chlamydia. 🙄😔 My hormones got the best of me and I burst out crying on the phone. My bf ran in the room like I found of something bad to our daughter I'm guessing. But nope. I didn't cry for myself I cried for my daughter. Because who knows how long I've had it. 🤔 I only been having sex with my bf father of my kids. I told him I had a std. This was HIS response. "Remember last year?, I drank when I took the meds. So I'm sure I still have it" then he looked up "can your std never get scanned for a year" then he told me it can go undetected for a year..... But check THIS OUT. I looked at my tests online and I took 4! Std tests and I was NEGATIVE for Everything!🤔🤔 how can they all be neg but you have a std for a whole year but not me?? Till now??!
He keeps telling me " I swear I haven't had sex with nobody" and the usual stuff a guy says. I need a medical person to tell me if I'm right. I am hurt. I can't even look or talk to him. I've been blaming it on me. Am I ugly now? Is it my weight?? Is it my low sex drive? I'm Pregnant for goodness ! I know he was cheating on me because wouldn't I been knew ? All those 4 times. Then if you have a std and u give birth my son would of had stds as well ! So I'm sad. 😔 I was hoping for a "bacteria infection" or urine infection Not a Std. The thing about it is we moved a hour away from where we lived when we was cheating on me. But now I realize that Everytime I went to my moms house and he left to "turn up" never texted me. His phone was always "dead" he was just cheating on me. And my last test was June. So that means I got this std recent 😢
Any thoughts?? What should I do.