Advice on continuing Pregnancy

Long story short my pregnancy was Unexpected and I’m still on the fence about what to do me and my ex have 3

Kids together but he cheated and in the process got someone pregnant, the baby is three months and things have been rocky and u predictable between us because of this new dynamic with Co parenting but we’ve been together again & trying to figure how to fix things and if we either want that but now I’m pregnant and I’m soooo confused in what to do? I wanted another child as he already knew but idk about this whole dynamic anymore I feel it’ll make me look dumb or as if I’m trying to hold on to him or keep up with the new child’s mother? But then I also don’t wanna terminate my pregnancy because of judgement and because of his Fuck ups I’m an amazing mother🤷🏽‍♀️