What do you do when you're in financial crisis now and don't have time to build up a coupon stash. The first thing you should do is let your church know. They are your main source of support, don't let your needs go unheard. If you don't attend church regularly, this would be a great time to find one.
Secondly, food is an easy place to cut your budget if you have to do so. Remember, these may not be the best meals of your life, but they will keep you nourished until things are back on track. Liss at Budget 101 has a $10 food plan here. You should also consider Angel Food Ministries and Aldi as good resources.
Dollar Stretcher has some tips that could be very helpful to you. They have an article on surviving job loss here. And a page devoted to financial crises like foreclosure and bankruptcy here.
