Need some advice

I have 3 kids. Ages 4, 2 & 6 months. I just found out I’m pregnant again & don’t know what to do. I was taking my bc pills every single day. My boyfriend (who’s the father of my other 3) doesn’t want another kid which I understand because of our financial situation but I don’t want to get a abortion😔 I just can’t do it. What would you do?