It's easy to feell alone and lost when the depression really grabs a hold. You and your family need for you to put one foot in front of the other long enough to seek medical help.
It's so easy to turn ourselves inward and watch our world slip away. Believe me I know only so well. Each day is a struggle even when the meds are working. In your case they aren't and you feel your world is shattering around you.
Take the time to get some help. Keep posting on PC cause there are others out there fighting with you.

kebs