Single mommy expecting baby #2

My baby girl just turned 1 March 22nd 🎊 & 3 days later I found out I was expecting baby #2 🤰🏽 only Problem? Me and babydad do not get along at all. It was literally a one time thing and I guess it really does just takes ONE TIME. BabyDad has done a lot of things in the past that have put me and my baby girl in harms way including harming me physically. In fact, I currently still have a ofp on her dad. BabyDad still acts as if he is a middle schooler and doesn’t want to get a job. In fact, when I say that our baby girl needs something he tells his family to buy it then tries to manipulate me in telling me I’m this and that, trying to make it that I’m this bloody person when I’m not and I struggle to get her everything she needs by myself. I have my own place and my own car, I work and baby girl goes to daycare but I am anxious and nervous about baby #2 because baby girl is a starting to act as if she’s already at her terrible twos. She is spoiled and I feel terrible about bringing another baby in and her feeling left out. I feel terrible because I’m bringing another child in this world without a father who is responsible enough. Any advice?