10 weeks abortion

I'm scheduled for an abortion tomorrow and now I'm having second thoughts, it's not something I wanted to do in the first place. I'm not financially stable, still live at home, and my boyfriend wouldn't step up and be a man so he's paying for the abortion. I didn't quit smoking and I haven't been taking pre Natals since I thought I wasn't going to keep it. Do you think I would have a healthy pregnancy and baby if I do change my mind tomorrow?