Hi Korman.
I know some of what you are going through, and whatever brain waves I can offer.
First, hate to say it, but Medicare won't kick in until TWO years after SSDI officially declares you disabled.
You sound like you are doing pretty well on expenses!
Your grocery expenses sound reasonable, but if you aren't already doing so, use coupons, free samples, etc. This site maintains a very good coupon section, and most stores will "double" the coupon up to 0.50. (i.e., give you a $1 off if you have a 50 cent coupon). Some double up to a dollar, sometimes they triple. You don't have to buy a newspaper, most of the local ads are now online, as are coupons. Don't bother printing coupons, as it runs through much toner and paper, but where possible, use the links to have them sent by mail. By combing ads and coupons, we've been shaving 50 - 75% off our groceries.
The internet, well, with our system we have multiple screen names, so my mother and my sister use screen names from our account. Perfectly legal, and saves them the $ for something I'm already paying for.
Buy clothing, etc., at outlet sales, or on clearance at the internet, and use every coupon offer you can find.
www.247malls.com maintains a pretty good list of active coupons. Google away, too, to find the best deal for what you need.
The freebie section, may be small stuff, but 4 pounds of dog food free, or 10 sheets of computer paper at a time, personal supplies, discounts on meds, etc. adds up.
I'm not sure what you exact needs are, but read people's journals on this site and post questions for things you find applicable. People are pretty supportive in explaining specific things they done. It's harder to give advice blindly than to explain how specific savings were achieved.
Hope that helps as a starter.