Have you applied for food stamps? Or looked into any support you can receive since you are a single mother? I don't know what state you live in, but there are quite a few states that offer support for single mothers. And if you can't go to a place, call said organizations (salvation army, local government human services, etc) and find out if they can mail you applications for assistance without having to go anywhere. Also I don't know how viable this is, but in the job forums on this site there are links to at-home jobs online. This could possibly help you find some work at home.

Wish you luck!