I'm sure the depression has something to do with the life altering car cash, and the proper medication can help restore a balance. Not every depressed person needs medication, but the right medication can do wonders to get the chemicals in order. You may not have found the right medication. You don't say your age, but women's hormones can also have a huge effect on our feelings and perspective of a situation. I think it's normal and good for kids to take mom's for granted, they should be thinking that there mom will always be there, but it's also important that they appreciate what you do for them and have respect for your role in the family. Maybe a heart to heart at a "family meeting" would help. Perhaps your minister can be of service to you in this matter, I'm sure he could lead some kind of discussion with your family, and let them know you need to feel valued. Lots of times when mom's don't feel valued, other members of the family are feeling the same way, and this could be a good time, to see if others are feeling unappreciated. I'm glad you are reaching out to others, this is a wonderful sign, and you are taking better care of yourself than you realize. I think you are going through a particularly hard time in your life, but much of what you speak of it normal, hubbies that fall asleep and belligerent daughters; there is a payoff if you can make it through this period. Unlike others, I don't think life is just a place to have a good time, I think we are tested, and the Creator wants us to learn something. Sometimes, finding this purpose brings a new spirit in our lives. Another tip is to reach out and help others who are experiencing depression. There are many community programs for depression, and while some do charge, most are based on a sliding scale, and the cost is minimal.
This link has some good information on depression:
Depression: Signs, Symptoms, Types and Ways to Get Help
This link tell how to find or start a support group in your community.
Depression and Bipolar Support Alliance: About Support Groups and Chapters