OMGG Is it his baby ?? I hope not 💔🤦🏽‍♀️😥

me and my boyfriend been together for almost a year (next month makes a year ) we’ve been on and off for a year and a half previous to this year that we been together . Well long story short , we got back together (unexpectedly) last year but were taking things slow at the time . For the first 2 months (Feb&March) we were seeing eachother but weren’t official as of yet . Well In June 4 months into our relationship I find out he had sex with a girl and SHE WAS PREGNANT 😤🥺... when I spoke to her she said they had sex in the beginning of March . BUT here’s the catch .... she is married !!! My bf said when they had sex he saw hickeys on her neck but he didn’t care , she was just a girl to have sex with after him and I fell off for a few weeks 🙄 ( WE WERE NOT OFFICIAL) She is so convinced my bf is the father but I know she had sex with her husband few days prior to having sex with my boyfriend. I know he did not cum In her (his pull out game is STRONGGG) Also , my boyfriend had chlamydia at the time they had sex , he doesn’t know how long he’s had it because he didn’t find out till I caught it and went to the doctors for it. I know for a FACT after having sex with her , he didn’t have sex with no one else besides me . My doctor told me what I had was severe and could affect my fertility as me and my bf tried for months with a baby no luck until after clearing the infection I fell pregnant that month but unfortunately lost the baby 😩 SOOOO .. my question here is being that my bf did not nut inside her and had low sperm count due to STI .. how can this be his baby ???? Even with the possibility of being pregnant from pre cum it wouldn’t have been viable to continue on right ?!! It’s a possibility that if she had sex with her husband his sperm could have been waiting until she ovulated , which made it tricky What y’all think ???? Help I’m losing my mind waiting for this DNA test