Gwyn,
First, I'll say a prayer for both you and your DH.
Call 211 in your community and find what the resources are to help. They're available - you just need to know how to access them. If you don't have 211, call the local Salvation Army or Red Cross and ask them to refer you to an agency that they think provides services like transportation. I also bet that your county may have transportation services for this type of situation since you can't drive due to blindness.
Please call rather than have your sons miss school and you being dependent on others to pick you up. That's why the services are there.