This is a very familiar situation to me, Robin. I went through similar circumstances, and I can understand the anxiety you're feeling. There are a couple things I would suggest to you as far as finding the funding so that you can finish school.
As peaceful said, you should check with your schools
financial aid dept. If you qualify for pell, you should also qualify for some student loans. Make sure that your financial aid dept has taken into consideration the costs of childcare in your eligibility (there's usually an extra form you have to fill out for dependent care costs). You may also find help from some government agencies for childcare. I'm not sure what state you live in, but here in Illinois, there is an organization called CHASI, and they will help pay for child care, leaving you only responsible for a very small co-pay (mine was like three dollars a month for having three children in child care).
Most of all, I would suggest that you just pray about it. God is good you know, and He has lots of blessings in store for you. It isn't His plan for you to feel worried or anxious. I know that this is probably very upsetting to you, and financial worries can be very difficult on a family. I'll be praying for you myself. Let us know how everything works out.