I am a single mother of 3 children and will be 44 years old in March 2007. I felt the same way you did when I was first diagnosed with MS but I have to assure you that it really isn't that bad.
You have to believe in yourself, have faith but most of all you have to beat the MS before it beats you.
I went from being in a wheelchair to where I am today, that is going to school in order to get a degree, taking care of the house, the kids and in a new relationship which I am going to be married in September 2007.
So don't give up because God will always light up the road that you have to travel and have faith.