Lost and Lost,
I am sorry you are having such a hard time. I know I get very discouraged during flares- when I can barely walk across a room and the optic neuritis screws up my vision.
Just remember that not every day will be a bad one. Try to hang on for those good days, and in the meantime enjoy what you can: go outside and breathe the fresh air, sit quietly and listen to some uplifting music, cuddle one of your kids on your lap, or spend some time in conversation with your husband about something that doesn't involve MS. MS will change your life, but it doesn't have to ruin your life.
I know it's hard, but the good news is that you are not alone. There are plenty of people right here who understand exactly what you are going through.
Be joyful in hope, patient in affliction, faithful in prayer (Romans 12:12).