We're running on a pretty tight budget here too. I shop mostly second hand or clearance for my kids clothing, and for myself, and buy all my groceries at the discount grocery store. I bag my own groceries there, and have a little less selection, but that's no biggie to me. Stick to the cheaper meats (chicken and ground beef), and try some meatless meals, try baking your own bread (so yummy!), don't buy the little pre-packaged stuff - buy in bulk and divide into portions yourself, avoid the prepared foods - you can usually make it yourself cheaper, ummmm.... go bulk where ever you can, but be careful that you don't consume more, just because you have more in the house.
Watch your "extras". WATCH YOUR CREDIT CARDS!!! It's so easy to let those get out of hand! Only buy what you can pay for.
Check your budget for things to cut, or hunt for cheaper providers - memberships, cable, satellite...???
Hope things ease up for you soon. I know it can be really stressful trying to keep ahead of all these things. We just had our property tax bill come in, a car repair bill, income taxes, and a dental bill all at the same time. OUCH!!!
Hang in there! You'll make it.