abortion or not

I cannot make my mind up about this, I do not want to deal with it, I just regret so much. Since I found out I'm pregnant I've been obsessively researching everything from abortion to how baby is growing and developing to can I make it single with 3 kids. I'm not financially stable, I live with my parents and work a shitty job that I can't even afford to move out. I'm so overwhelmed with the 2 kids I've got. I don't know if I could physically and mentally handle 3 kids. But I don't know if I could emotionally handle having an abortion either.  I love my kids to death and would go to the end of the earth for them. This is tearing me apart.

I know in my heart that if I have this baby I could never give it up for adoption. Is it fair to this baby and my other children if I go through with the pregnancy being that I don't have the money and am already overwhelmed with 2?  Will things work their way out? Does anybody out there had a similar situation? I have an abortion scheduled for tomorrow. I will be 7w3d. I didn't make it through the abortion appointment last week and it is absolutely killing me knowing that that baby doubled in size and just developed that much more. Please help.