Quoting BG Secrets:" I feel so ashamed. I never wanted it to be like this..I wanted our second baby to be something that ... [snip!] ... own mother because I feel like a foolish teenager who has just found out she was pregnant..I know she'll put me down for it.."
It really sounds like you want to keep this baby. You seriously have nothing to be ashamed about. Not the way you're feeling, or anything. It's a tough situation, and a tough decision.
If you want to keep the baby, you can make it work. I promise you, you can make it work.
Do you have even one friend you can confide in for support? What about outside help?
I found a site for help for low-income pregnant women and families in the US. Is there anything there that sounds useful?