Dysfunctional but I need advice

So I’m 7 weeks pregnant, I was with the father for the past 7 months & I lost my virginity to him 11 years ago I’ve been on and off w him since, I ended up in a 5 year relationship in between and had 2 kids with someone else. I’ve been back w we’ll call him R for 7 months & I got pregnant . Soon after I found out I was pregnant I also found out he was cheating for 2 months with his ex who ended up finding out this week she’s pregnant too. My kids father to my other 2 is begging me to abort it, I’m gonna be a single mom of 3 ans my kids father to my first 2 is saying he isn’t gonna help out as much if I have this kid. I don’t believe that but I don’t know what to do. R is going down a bad rabbit hole rn already with other girls other then me and the other ex who’s pregnant and everyone’s putting in their 2 cents . I’m already 7 weeks so I need to figure it out now. And please no judgement, I have never supported abortions but in my situation I have 2 I’m a single mom and rarely get help and the man is toxic and has a lot of issues I’m just lost and need advice