please don’t judge but what are the chances ?

please please please don’t judge me on this i’m genuinely asking for help.

in august, i had sex with my bf a week after i had a confirmed chemical pregnancy and he came inside me. we broke up a few days later and i slept with someone else a week after we were officially broken up, it was around my fertile window but he did not cum inside me. i missed my period and took a test, it was positive.

but then at the beginning of september (a few days after the positive test) i got what i believe was my period (meaning another chemical) and i took a test two days after it started and it was negative. it seemed like my regular period with clotting and everything.

this is also around the time my bf and i got back together. i was suppose to get my period at the end of september but didn’t and i found out i was pregnant. i only slept with my bf the entire month of september.

what are the chances that wasn’t my period and just some early pregnancy bleeding and the baby is actually the second guys ?

i didn’t go to the doctor in early september to confirm it was a chemical because i didn’t think i’d get pregnant again the next month. please don’t judge, i’ve already told my bf about it. he’s been supportive but i know it would break his heart if the baby wasn’t his..

****edit: when i got my ultrasound it was when i was suppose to be 11wks and 3 days (if i had gotten my period at the beginning of september) but it was reading 11wks and 4days