Do you have a therapist to help you cope with things? That might help. If you have insurance, that should largely cover the cost. If not, perhaps you can find a sliding scale clinic.

Try taking things a day at a time. See if your hubby will watch the kids for you for an hour after dinner--use that time for yourself. Take a shower, wash your hair, go for a walk. Do your nails. Anything for YOU, to make you feel like you've had a moment to yourself, for yourself.