Try and Make It Work or Leave

So I have been a really depressed this pregnancy and I'm so confused on what to do. I am a mother of 2 (ages 8 & 3) and now pregnant with twins. My relationship with the father of my youngest have really been up and down and we can't seem to get it right (trying to mold a person with a troubled past has not been easy but I see the good in him). In a lot of ways we seem to better each other bc we motivate each other but he is irresponsible financially and I am the type that needs every bill paid in full and in time. He gets mad when I try and micromanage his money when I know a bill is coming up, but I only do it bc I can't deal with the stress of things getting cut off or being late enough for me to worry when if he could only manage his money better we would not have any issues. Now I ended up pregnant with twins and he ended up leaving me and due to me not wanting the bills to pile up I shut my home down, moved in with my mom until the babies are born, and signed child support papers. Now that he knows about the upcoming court date he is really trying to come back and do the right thing (he say) and he is saying all the right things and I'm falling back in love. I'm not sure if I should stand my ground and move forward with child support and make it on my own or should I allow him his 1000th try? A part of me really didn't want to give up the dream of our little family and it scares me at the thought of raising twins without his support... Any opinions ladies?