So last Monday my mother found my fiance on tinder flirting with a chick..of course he blamed me…

So last Monday my mother found my fiance on tinder flirting with a chick..of course he blamed me becuz the night before some random person I have no idea who it was messaged me... Im trying to keep my cool... I went off on him the moment I found out.. but its so hard. He calls me stupid, idiot, ect..and gets mad when im upset becuz of it. Its so hard to even trust him. He just started work now.. his phone is off, hes going to texas for 3 days with friends to trade cars... I just have so many thoughts going threw my mind. Hes a good dad... when he puts the phone down..and I do everything to make him happy. Im staying at home with my son... not my kind of thing but he doesnt want to put baby at risk... and I get that still not okay with me not working.. oh yeah an he wants a paternity test becuz he doesnt think the baby is his... and i have been faithful since day one..