Im still fairly new to all this myself, which is why I've done more listening than posting any advice. I am still learning, and making my own mistakes on the way. I think most of us can relate to your pain. My family IS my life and has been, and I feel it slipping away. Its the worst pain I've ever had to deal with, ever. I've lost over 20 lbs in the last month, I still have hard time sleeping, even with sleeping pills. It totally sucks.
But PLEASE PLEASE rethink this, and get some help, now. There really is nothing to gain by taking your own life. Please listen to some of the folks on this forum, they have given me much advice and support. They have helped me already more than I can probably every repay.
Me 44 H 39 Met in 1998 Married in 2004 D 5, twins Bomb - May 16th, 2010
"Don't let Tomorrow or Yesterday get in the way of Today"