I just feel so UGH !!! NEED ADVICE ASAP

I confessed to my SO like a couple days ago that i had hungout with one of my guy friends and we chilled smoked and drunked and while we was hanging out my ex had came trying to take advantage of me i left , My SO was upset but we got "Passed It" , Now everytime we talk about anything he always seems to bring up what i told him that day and its like i told him if you dont forgive me then leave me i told you so thats a good thing he takes it as i just let my Ex have sex with me because that day we argued because he went to go see his other child and i wanted to come because it was never a problem it was easter wanted to see the kids have fun he refused which i found wierd so he think i had ssex with My ex being spiteful but seriously? Ugh hes had me at my last you have sex with me and everything and tell me you love me and when your mad im this and that and i did that and im pregnant 13w and 4d so its like idk if hes thinking our child isnt his or anything i need advice please idk what to do i just feel like i shouldve never told him anything if he was going to about it like this any advice ?