Help?!

A little back story, I’ve been with my husband 6 years. We have an 18 month old and we’ve been on the rocks for over a year now. We separated temporarily for a few months but I moved back in with him due to pressure from my family. I finally got to the point where I am completely exhausted with trying to work things out with him. And here’s where things take a sharp left. I just found out I’m pregnant. I know that I shouldn’t continue with it because I can’t afford to be on my own with my current child and he won’t help. I also know that I’m just going to continue to be miserable if I stay. But I keep second guessing myself and I never know if I’m making the right decision. We were actively using protection as well. I know it’s my decision at the end of the day, I just need the reassurance that im making the right choices 😅