You may be entitled to DLA, Incapacity Benefit, Income Support, Housing Benefit, Council Tax Beneft and Working Support Allowance. You can apply online at Direct Gov site. Please PM m if you would like further information on filling out the DLA form as it is very important that you describe matters on your worst day so they get the full picture.
Don't give up, life can become better if you work at it and longer term you may be able to return to work. You do have a future, many of us have felt the same as you but it takes patience and strength to pull yourself out of the hole.